If you look at the road when you drive towards Catford, the big white painted letters read "AHEAD ONLY". I assume that this also applies to the right turn into Halfords.

The road sign on the lampost opposite Wickes reads "No Right Turn". There is also a claim that cameras enforce this.

Lots of drivers ignore the restrictions.

I think the restrictions are there to keep the traffic moving.

I put fence poles over my shoulder and walk home with them.
Some people borrow one of their trolleys.