Weather permitting, daytrip to do some dry tooling at Saltdean (https://www.ukclimbing.com/logbook/crags/saltdean-11148/ ).
You will need ice axes, mono-point crampons, 60 meter rope and (apparently) sunglasses.
There are trains from Victoria, London Bridge and Clapham Junction, although some people may prefer to drive.
If you don't fancy the chalk, you can always come along for a... hike?
Ignore the end date, this is a daytrip only on 27 November.