Spotted...

Dunno.

I refer to it as Bloomsbury Triangle too, but that's not right either.

Perhaps we need a thread?

Well a circus is defined as "a busy open space, usually circular, where a number of roads meet." Perhaps ASLI is better - Another Strange London Intersection

As in "I spotted Velocio this morning at the New Oxford St./Shaftesbury Ave. ASLI."

I like it.