On 21 Oct, 10:07, David wrote:
On Oct 20, 11:25*pm, "Jack Taylor" wrote:

Offramp wrote:
I was *thinking* of Baker Street and Bond Street!

And Great Portland Street and Baker Street.

So that makes 3 in a row, sort of; maybe that is unique

Tangentially, here is my underground quiz question (a 3 parter)
On which Underground line is only 1 station served by all* trains?
On which Underground line are only 2 stations served by all trains?
On which Underground line are only 3 stations served by all trains?

*at normal times of day, at least

Are the first two answers

District Line (Earls Court)
Waterloo And City Line (Waterloo and Bank)

I thought the third might be the Northern Line (Kennington, Euston and
Camden Town) but that does not account for the Mill Hill East shuttle.