Very nice TPHub. Well composed shots and great variety. Those Thameslink units get around - seen a lot of those numbered units on the south eastern network of late and now they are popping up here as well!
700s operate all over the network in and out of London. To places including Cambridge, Stevenage and Bedford to places such as Brighton, Rainham and Dartford.
EMR (Ex-Greater Anglia) Class 360s will soon be in service (London St. Pancras-Corby) and will whizz right past Harlington, Beds. Will you be filming them in action when they are in service. en.wikipedia.org/wiki/British_Rail_Class_360
Cracking vid, thanks for sharing. Go to anout 8m 12s, watch the Coupling on 700 104 after it's pulled out of the station, wobbling about like anything.. lol