zin92 wrote:

Unfortunately I think you'll be very lucky to land at 10pm and get to
Blackheath by 11pm.


Paul C's route described elsewhere on this thread sounds solid but
nontheless I also think trying to do it in an hour is pushing it. If
you took a taxi I can't help but imagine you'd get stuck up in traffic
(friday night is party night after all), though this could possibly be
avoided by going round the M25, but that's just much further -
depending upon which route you used to get into Blackheath you could
end up doing almost a half circle of the M25 - which would eat up time
too.

Earlier flight?