The Uk's Most Dangerous Abandoned Railway Tunnel? 

Very interesting again, glad in a way that the mile long tunnel was barred to you, because I don't want any harm to come to either of you. Enjoy your escapades, stay safe, Al the best from Cornwall. x

Absolutely brilliant! Thank you. Another really interesting place that I have not heard of but should have done! Demonstrates the huge advantage of having good airflow through a tunnel. I’ve been in a couple where I decided to get out due to foul air, in both cases they were totally blocked at one end. Safety first!

In a way, I'm glad you couldn't get in the danger tunnel, please invest in one of those gas detectors for permanent use and take it everywhere, you never know where there might be bad air! Also getting some of those sport oxygen cans, won't give you full life support, but will help you escape if you hit bad air and feel woozy or start hyperventilating.

Another quality video. Especially highlighting the health and safety concerns with the locations. Well done excellent as always, can’t wait for the next video.

Wow! Another great video, about a couple of tunnels that I don't think I knew about. Fascinating stuff, and I love the still photographs you managed to take. Would love to go and visit these myself some day. Very atmospheric (if you'll pardon the pun!).

So, Rebecca, who is presumably quite fond of you, sneaked over and padlocked it before you could get there, hemce the innocent but pleased expression? :-)

All credit to you for giving it a try, and very professional to have made such careful preparations. I love your presentation style (both of you), very relaxed and well-informed. Thank you for the pleasure you give me, cheers Peter

Your videos never disappoint! Thank you! Even though the second tunnel was barred to you (= us too) this was still very entertaining and watchable.

I've watched nearly every video you have on the channel currently. I've loved seeing the progression as you have honed your skills over time. Your channel is awesome, and you have inspired me as a fellow youtuber to constantly up my game on every video I produce and publish on my channel (not this profile, and completely unrelated content!). Thank you for keeping me entertained, feeding my love of history canals and railways, and providing me a portal through which I can explore the country in which I grew up from the other side of the world. Stay safe, and I can't wait for your next awesome video! I've signed up to support you via Patreon :-)

Paul and Rebecca, another brilliant video. Many thanks.

So cool looking at the old tunnels! Thanks!

Hi Both Another great effort to discover our amazing engineering past. Well Done. 10 out of 10 for perseverance. You will become leg ends especially with those waders!

Keep up the good work, I always enjoy the videos, best of luck with the future

Great video, shows the importance of forward planning. Was half expecting Martin Zero to turn up too.

+Paul and Rebecca Whitewick I used to live in Staithes and the Grinkle tunnel I walked past dozens of times when walking my dog and always wondered what it was for, as the access from the Boulby Mine side was really good, looked in a few times with a torch but never ventured in, it wasn't blocked off like it is when you were there, I used to think it was possibly part of the east coast rail network, but never bothered with delving into it's history. As for Port Mulgrave, it used to be a lot more defined in the jetties and old workings than it is now, the weather and stuff have taken their toll. The Caterpillar digger you walked past was used by a local chap from Hinderwell to carve out an access path from the top to the port many years ago and the huts you filmed used to belong to him. From what I understand, it was thought impossible to create the access path as the gradient is that steep, but the chap did it anyway. Great video, glad you enjoyed the area.

hey paul and rebecca , another cool nice and interesting video , well done and thank you for all you do for us , :)

Thanks for the video. Love tunnels first one quite interesting Loved seeing the old sleepers. Shame the big one was locked you were not ment to go in on that day looks absolutely awesome though!!😎🚂🚃🚃🇬🇧

Fascinating stuff as ever guys - thanks for all your efforts - from a dedicated armchair explorer !! 😎👍👍

That was a great explore anyway...Keep em coming and stay safe.

It’s a great explore. Dave and I were there a few weeks back. The air can be nasty and the water hides things to get caught on. Glad you got out safe

Good to see you apply a good dose of common sense with your exploration. The last anybody wants is you guys putting your good selves in a tricky and lethal situation for us couch viewers. Great explore all the same.

I have been into most tunnels in the area, except the locked one. I was told by a local ex military chap that was born locally not to attempt it, he went into it over 30 years ago, It was partially collapsed back then. There has been a suggestion it was collapsed on purpose by the Navy, they blew up the harbour to stop the Germans landing there at the start of WW2.

Always interesting and entertaining, thank you :)

Must be 25 years ago when I visited many of the attractions along that coast. Port Mulgrove was one of them. I remember going down the 'dodgy' steps and looking back at the cliffs for the tunnel and wondering how the hell did they do that.. certainly an interesting presentation. thank you

Some of these old tunnels (or mines) require the utmost in safety equipment such as nail proof boots and self contained breathing apparatus. It's not just low oxygen that can get you but also gasses in the water that gets stirred up when wading through that water. In some areas an unlined tunnel roof can collapse without warning just from your footsteps or voice. It's really good that you emphasize the need to turn back or avoid going into some of these places in the first place.

Another great watch Paul & Rebecca, I can appreciate the frustration in not being able to see the interior of the tunnel properly, but given the poisonous gases in such places it is maybe just as well there was a stout padlock in place. Stay safe & well both. 😃

Interesting video mate and glad you always take a good view in health and safety chap.

Brilliant vid so informative and love all your safety .

Another great video, thank you

Paul and Rebecca, if you ever get bored and you are in Surrey, look into the underground tunnels in Dorking, I lived in Dorking for19 years and the tunnels and caves fascinated me as a lad.

Your videos just get better and better well done from NZ

Great video as always, got to admit the tunnel collapses would put me on edge long before the oxygen. Stay Safe.

Really interesting stuff. Know Port Mulgrave Well. Thank you

Nice video, and safety allways first , well done.

Great stuff as always. If you're ever in eastern Scotland I can point you tk some really interesting stuff 👍

I'm with you rebecca and would stay outside too! Good video, well warned about tunnel dangers and lovely to see you 2 getting out and about. Thank you.

Fabulous as usual. Shame you couldn’t get in that tunnel but if truth be told I’m glad you didn’t would hate to see you hurt. The first tunnel was great at least you got to go into that one. I so enjoyed that thanks so much for taking me along and p,ease stay safe

Great video! Shame you couldn't get inside but maybe it was for the best. I explored a tunnel recently I came across in the Peak District, I came to a collapse near a vent, seemed so exciting going in but after the collapse, I felt quite an urgent desire to get out!

What an explore. Shame tou couldn't access the second tunnel but still great to see the port.

Wow wow.... I love your channel guys... And this place... Love it at mulgrave been a couple of times xx keep been you 😘 🙏

Very exciting! First tunnel was great. Second would have been incredible BUT your H&S must come first and I'm pleased you made the decision you did. Wonderful film. Brilliant history.

Love the expressions on Rebecca’s face at the end they tell the whole journey in a nut shell.

Yes, I was in there when it was still open, really don't want to go beyond the collapses, you'll struggle to get back out. Ooh,. this is going to annoy a few people as they try to keep it very quiet about this place. You can still gain access with permission on private land. Ooh, that path down the cliff has been put in recent, I had to use a rope to get down as the collapse was really fresh then. I went over the first collapse but did not enter the 2 tunnels, they look horrific, thick ocre everywhere sucking the oxygen out. Having been in, at least I know your not exaggerating.

1st one you went into was perfectly straight, and all this built before the invention of string lines.🤔...🤣. Love the vids 🥰. Keep'em coming 🥰. Rich 🥰🥰🥰

Good video,keep safe going into tunnels

love the fact that you do these type of places but along the lines of yourselves and martin zero but always make safety priority no1 thanks

Oo, serious exploration, waders and a bleepy thing. Very interesting video this week guys, enjoyable indeed. I'd give you five stars easily 😂.

As fascinating as it is to follow along on your explorations, I'd rather you didn't die half way through a recording (or at any other time; just saying), so I am glad that you left the tunnel when you did. Oxygen deprivation is extremely disconcerting, since you don't realise that you're in trouble until you're practically dead. Confusion is often the last symptom you get before you keel over. The most dangerous tunnel is still beautiful to look at. From outside.

Came across your channel by accident, wow and this was the first video I watched awesome video, awesome content

You seemed to have such a struggle to reach the south end of Ridge Lane Tunnel which is a shame because the north end is a lot easier and drier. Although this tunnel has several well-made refuges in it two tramps were killed here by a passing train in 1882. Although the rail gauge was 3 feet the locomotives were pretty big. The Port Mulgrave Tunnel was constructed in 1875 by extending one of the existing passages of the Port Mulgrave Mine so most of it was unlined; the inland end is a length of about 300 metres lined similar to Ridge Lane Tunnel. This end is also kept locked because of deteriorating air quality, flooding, and collapses in the unlined portion. Even in the 1920s Port Mulgrave tunnel was blocked by collapses and Port Mulgrave itself no longer used for exposting ironstone to the River Tyne; instead it went via an incline connection at Grinkle Mine up to the railway network. It's important to only enter tunnels like these when aware of the risks from poor air quality, roof or side collapses, and holes underfoot especially when going through a flooded section. Within recent years the seaward end of PM tunnel has had a major collapse before reaching the second junction exposing the soft shale around the lining so further falls must be expected. The padlock on the gate is there for a purpose so please respect it and don't try cutting it off, don't be responsible for harm to yourself or others. Simon Chapman, Secretary, Cleveland Mining Heritage Society.

Great video and good to see you made it up north. I know the path down to the beach and port. The Alum industry prospered in times past. I was expected you to divulge your oxygen levels when you climbed back up to the top. Can't imagine everyday climbing down the cliff doing a day's work down tje mine then tje climb back up at the end of the day. Great work guys

Hi there you just come up on my recommendation list we have just subscribed 👍

Great channel makes me miss exploring.

Great upload hello from Australia

To P&R thanks for an interesting video.I don’t know that part of the country,but the post industrial landscape ticks all the boxes for me.

A lovely area only a few miles from Whitby. Interesting facts about the mining history & tunnels 👍👍😎

Good one Team.keep it up and god bless you all.

Lol. All the gear and your wife has an M&S bag for life. You guys work hard. Well done.

I love your videos, would like to see more! So don't risk both of your health on producing a daring video. It isn't all about life and death - actions can have consequences later in life and be careful not to breathe in fungal spores etc. Although you didn't get in the tunnel I enjoyed the video all the same :) I am pleased that you had an oxygen meter and that you were educating people to the risks - a nice touch.

You can get in the grinkle mine futher down the tramway from ridge lane. Myself and a friend spent 40 mins exploring it last year

Are you still in the north east? I’ve actually been in this mine but only to the first collapse. I grew up in Whitby there are so many amazing tunnels and mines around this area. My cousin is a historian and knows a lot about the old railways and mines if you’d ever needed any local knowledge... keep up the amazing work.

one of my favourite local areas ;) nice video guys

Great video. I can also recommend 'Patrick Dickinson' for tunnel exploration.

Got out of breath just watching this. Entertaining even if you didn’t get inside.

Here is somewhere that may interest you -The Pwll Du Tunnel was the longest horse-powered tramway tunnel to be built in Britain at 1,875 metres (6,152 ft) in length. It started in Blaenavon, Torfaen, Wales, and was originally a coal mine, running northward almost horizontally into a hillside

wow what a great and interesting trip, guess it made so much fun

Hi Paul and Rebecca. Safety must be the ultimate priority. That particular area of the Yorkshire coast is very unstable due to its geology. I have known Port Mulgrave in excess of sixty years and is historically excellent for its fossils. If you find shale pieces and split them there is usually something to find. The tunnel you found locked I first viewed as a child. In those days it looked like a tunnel entrance in a bare cliff. There must have been some sort of bridge arrangement attached to it. You can sometimes pick up bits of Whitby Jet from the port area as well. If you research Scarborough hotel collapse, during I think the 1980's, that will indicate the danger of the geology. I've no doubt from here you will want to find the tunnel in the Robin Hoods Bay area from the old Scarborough to Whitby Railway. I remember an hotel at Robin Hoods Bay that had a very long back garden where they used to play croquet. Half of that slipped away about 40 years ago, so please take care both of you on this coastline.

Loving Rebecca's flowery shopping bag...!

Another good one even though you didn't manage to get where you wanted to be. Probably better that way! With every vlog you post I feel that you're getting more and more like Martin Zero. Please be careful.

Great to see you exploring the North East Coast 👍 Invaluable info on the unseen dangers of exploration. Hopefully next time you can visit Sandsend tunnel and Kettleness tunnel which were part of the Saltburn to Whitby coastal railway. Keep up the good work and awesome content 👏 👌

Usually the biggest problem with tunnels like that is because I've been bricked up both ends with only very small hope names there's no floor there to bring in fresh air in the air in the tunnel just stagnates

Can understand the disappointment of not getting into the second tunnel but it better be safe than sorry, the first tunnel was lovely to see. Still a lovely video to watch.

Cracking vid plenty of suspense. Shame about the lockout but the roof did look a bit dodgy and it's not worth getting in to find that your O2 meter works but you end up dodging flying rocks. Thanks for the enjoyable episode.

Was there no access to the other end of the longer tunnel guys? (Great vid as always BTW)

I was glad to see that you could not get into the old mine/tunnel area. The 'Damp' gases can be very explosive in an old iron mine like that and just one spark would set off an explosion. For those who want to know more- www.howden.com/en-us/articles/mining/the-most-dangerous-gases-in-mining

Great ti see you up in the north. Hope you got ice cream at Runswick Bay and time to see the nearby Rosedale railway.

12:34 I've cooked food in that circular hole

love your vids. love finding old history evidence. glad you used common sense and did not try to go in the second tunnel( might need breathing gear ). been in collapsed tunnels in the U.S. in the past but quickly realize the danger of being trapped alive. i was told that electronic air meters are not as reliable as a "davey lamp", or even the antique use of a live cannery to detect "bad air". great research and presentation. keep the vids coming and be safe.

Another great informative production. Not that’s I’m going to travel 1/2 way around the world to go into the tunnels, but I was wondering, can you use self contained breathing apparatus to go into places like that? Essentially above water scuba system.

Rebecca looked really fed up because you could not get into the second tunnel........may have something to do with forgetting her name on the last video!. Your bringing a whole new meaning to KEEP SAFE!

Gutted about the lack of access. There are some good railway tunnels down that way on the Whitby to Scarborough line though. A future episode?

Loved it

Like your video. Just a couple of points, ... The O2 meter, is a 5 gas type? It's important to state for anyone thinking of using one of these that it should have a valid up to date calibration certificate to ensure its in good working order. I believe the certificate lasts two years and after that the device needs to be sent to a lab to be checked. The device has a self check which operates when you switch it on but if it isn't calibrated this could give a false reading. The certificate should always be with the device. Also if you're in a tunnel and the alarm activates you should have a self contained escape set. These are a small breathing apparatus with a ten minute supply of air. It's important to have one of these because if the alarm on the O2 meter activates it could be because of the disturbance of the water you were walking through and turning around and walking back through the same water could push the toxic levels to a point that is deadly for you. Also being alone in the tunnel is not a wise thing to do either. All being said, I liked your video and you show that you really like what your doing. Way better than being stuck in the pub or spending hours in front of the box playing games. Stay safe and enjoy.

great video m8

A gas detector isn't much help without an escape kit and training. The reason you are told on safety briefings on aircraft. To put your mask on first. Is because you will be overwhelmed far quicker than you realize. Many people have died in trenches open to the air, and not at all deep. One risk in chalk ground, after rain and during low pressure. CO2 levels can rise displacing in oxygen, though this tunnel may be due to iron, which react with oxygen, so depleting it.

Port Mulgrave tunnel is full of collapses, and bad air. Likely hood is, you will die trying to get through. Ridge Lane is a pleasant walk through, some water but not as much as in this video. It’s now full of bat boxes, so a protected site.

Were all those huts and things abandoned?! Looks super creepy but awesome!

Very good, Meriden, Kansas

Disappointing it was locked, You should rate it two stars on trip advisor! 🤣 great video as always keep up the good work.

Facinating were these gravity/horse or narrow gauge loco operated, Loved the home made wee houses at the beach did the have pipe chimneys coming out them for wood burners.

Nearly missed this , didn’t get a notification for some reason

One point re tunnels & bad air is the possibility of methane which is explosive, so any electrical gear you take in needs to "Intrinsically Safe" and designed for such an environment.

I didn't hear any chirping from the gas detector, is it calibrated? The O2 sensor deteriorates.

If you guys want a real cool place to explore check out The Malvern Hills. The hills have an old tunnel that runs through it. Its a disused train tunnel that was used to store weapons during the war and been disused since. Its easy to sneak into, has massive ventilation shafts (smoke chimneys) 100's of meters high and the tunnel appears like its raining inside. Its just over a mile long will need waders to explore some parts as the water can get waist high. Need to enter via the Colwall side. Dead easy to get to, just jump off the train at Colwall station and walk down to the tunnel opening is right next to the tunnel in use (only like 100 yrds). Rumour has it the tunnel still has secrets still not discovered (tunnels that go to hidden MOD bunkers deep under the hills Malvern is/was home to a huge government research base and has been since pre war times and is well known for crazy experiments!) Few images of the place online and odd videos.. :P Home to some rare bats! Will need to squeeze through the gates also but not an issue its a wide opening. The area has plenty other places to explore also recently before its destruction you could walk around one of the top secret government compounds still filled with equipment! Missed the chance of that by about a year though unlucky!

As all ways an informative video. I am so happy you couldn't access the locked tunnel. Rebecca would have been having kittens. Hydrogen Sulphide is a nasty gas to encounter. Keep up the good work with the videos and stay safe.

I must admit I'm disappointed there was no funfair on the sea front there ;)

I've walked the Cleveland Way past Port Mulgrave several times, and had no idea there was so much in the way of disused infrastructure around there! I had seen the scary looking rope-handle going down a sheer cliff and never been tempted to try it. Out of interest, do you know why the air quality in those tunnels is so much worse than in others?

Loved the vlog, exciting, thrilling and oodles of suspense. Will Paul go into the cave??? Not on your nelly. Will Rebecca scare him out of his boots, surprisingly no. Totally captivating. Then there's Rebecca's laugh, ridicule or demeaning, not sure, but it works. Brilliant team, must watch. Thanks, and do take care.

Hi Paul, was that a gas meter or a monitor? We use gas monintors when working our engineering trains in the single bore tunnels on HS1. It gives you a constant beep to prove it's working and sounds an alarm on any low oxygen or higher dangerous gas levels. They need to be regularly serviced and calibrated of course. I'm glad you didn't get in as there would probably be dangerous gases in there as well as low oxygen as someone previously stated.

I come from a coal mining family. The safety equipment and procedures discussed in this video are ESSENTIAL.