Triangle,
Definitely an excellent inclusion in the list and probably the one that I knew existed but I couldn't remember where.

But possibly problematic as the road signs say it is SE22 (even though Wood Vale and Brenchley Gardens are both in SE23), and the fact that one of the lanes is a filter lane must count against it being a proper dual carriageway.

Erekose,
I thought Abercrombie sold trendy US clothes. But was he the one that wanted to bulldoze half of Forest Hill and place a tunnel under Dulwich? I'm glad we don't have that battle to fight in this generation.