Just a heads-up for anyone who uses this route into London.
Last week several of the old, probably-inactive, Gatsos disappeared.
Now there are numerous sets of average speed cameras. I don't know if they're in use yet (I hope not!), but they're not as obvious as the big old boxes as they are higher and smaller.
There doesn't seem to be any new signage... so it's not at all obvious that you're now being monitored along this entire stretch.
