Oh dear, I did the Halfords turn just the other day, the same day i sold the car lol.
Tis a bit pathetic I have to say. If it was a very busy place with constant turners I would understand it.
Worst part is, the only way to get in there legally is to either go round the one way system which is already gridlocked. Which the majority not knowing the area too well will do.
Or go first left over Catford Bridge, first left again, second left and up the one way road round the back of Tesco.... Then join the queue to rejoin the traffic on the bridge.
As has been said, thats doing wonders for the air quality eh !