Ian F. wrote:
There's an oratory, a cemetery and a road all called Brompton, but I've
never heard anyone refer to an area called Brompton, and I've lived in
south London for over 50 years.

Have you read Vanity Fair? IIRC Amelia Sedley's parents have a cottage
"in the country" at Brompton, to which she retires after George Osborne
dies.

Patrick