From what I remember this is enshrined in law, with the crossing being an A road it was argued in the house of lords that cycles could legally use it. This goes all the way back to the first tunnel which had custom built buses with bike racks on the lower deck and seats on the upper.
i once got escorted through the tunnel back to the Thurrock side when i refused to pay the overpriced toll, (i argued over vehicle category) back when they had barriers with coin buckets. I then went back again over the bridge and the let me through the second time at the lower rate that I was prepared to pay.
I didn't see anybody else throughout my waits there or anybody waiting to go back once I had completed my trip, so I'd have to say not that much. Hopefully this video may change that.
My local resident's account was renewed TWICE and they happily took the money TWICE and I had another £10 in my account which I put in there because i tried to re validate my card. They took another £4 out of my account, claiming that my account was not approved. 127 people ahead of me in the queue on the phone. The woman who tried to sort it out last time on the phone was from Leeds. So local people get highway robbed by people who do not live locally. This is more than scandalous!!! I want my money back!
i am under the local residents discount, however since then i have received over 30 pcns, each one appelled and then on have no reply so i further appealed to the tribunal... no contact back frim them and now i am dealing with enforcement, just a big scandal