Neil Williams ) gurgled happily, sounding
much like they were saying :

Never heard of all-night buses?

Yes. They don't come within 15 miles of this tube station.

I still don't think that Chesham (or was it Amersham?) justifies an
all-night service from London of any kind

Despite the fact I wasn't necessarily asking about an "all-night service",
you quite obviously haven't seen how full the last trains are, every night.