Robert Woolley writes
So which do you reckon is the hardest to pronounce?

For people whose first language is not English, the one with GHTSBR in the
middle of its name.

Naah.

Gotta be
Leicester Square (Ly-cester Square) or
Maida Vale (Maddyah Valet)

Plaistow and Theydon Bois catch out quite a few of the locals - let
alone tourists.

--
Dave