In message , Mike Bristow
writes

(2) Where reasonable notice is, or has been given prohibiting
intoxicating liquor on any train service, no person shall have any
intoxicating liquor with him on it, or attempt to enter such train
with intoxicating liquor with him.


Yeah but, how about taking a bottle to a party, or the bottle
of wine in your Sainsburys bag of shopping?

I would imagine the majority of the travelling public carry
alcohol on the tube at some time or other.

--
Edward Cowling London UK