Coming from the tunnel southbound i don’t think there is another average speed camera till after the Sun in the Sands turn off.
It’s not a route I regularly take so you’ll need to double check but I often see cars and bikes going well over the speed limit along there.
I ride the whole stretch of that average speed check and not got a ticket so far, sit at an indicated 62mph on a yamaha speedo
I’ve seen bikers go upwards of 70, especially heading out of London. I need my licence too much to risk that
Blackwall tunnel still drops to 30, but you’re usually stuck behind someone going much slower than that. Why is it that as soon as you get into London filtering bikers don’t yield to bikers behind but they do outside London?
The few times I travel into London later and that run down into Blackwall @30 is clear, I’ve accidently stayed at a higher speed as 30 along an empty 3 lane road feels strange - not got a ticket for that
There are average speed check cameras coming through the tunnel (I’m actually not sure what speed they are set to) but on the way out I must average 40 through it and not got done so far but sometimes there will be traffic cops lurking outside the tunnel too. Sometimes they are stood on the RHS with a speed gun but most often they are parked up on the layby on the LHS
I regularly do 60 coming into town - my satnav records 54, I also accidently pinned it but didn’t get anything. I know the three Gatsos, they had before the average ones, between Bexleyheath and the South Circular flashed but didn’t spew out tickets - the one at Kidbroke did.