I received this reply from Transport so hopefully they'll put up some signs, at lest it's logged until the next incident is brought to their attention.

Thank you for your email and photographs.

The engineers will add your concerns to our Small Traffic Schemes List. This list contains requests for small traffic schemes from ward members and members of the public from all over the borough. Each year these schemes are assessed and those where there is a viable solution are prioritised and taken forward as funding allows.

We will look at installing signs along Brockley Rise to discourage lorries trying to take this route.

I hope this is helpful.

regards

Imogen Payami

Transport

4th Floor Laurence House

Catford

London SE6 4RU