There is a motorcycle policeman standing at the exit to the Knightsbridge underpass speed trapping traffic as it leaves the tunnel heading Westbound.
Be careful!
Thanks for that. The tunnel is a nice place to open up usually for the sound alone.
I always found it strange that nobody checks traffic there… Usually coming out of the tunnel way over 70 
Its the first time I’ve ever seen someone there. I don’t come through the underpass but was tanking it coming off Hyde Park corner. Luckily he was not quick enough moving his gun…