Tom Anderson wrote:

Anyway, are there any other notable rail deserts like this?
There's one around Dulwich, but a lot of that's open ground,
so it probably has fewer people in it.

That one partly exists because of the closure of the Crystal Palace High
Level branch.

The obvious (to me) one is around Roehampton Vale. Admittedly it's mostly
parkland, but if you live in the middle you are a long way from a station.

Yeading is another one.