On Tue, 21 Oct 2003 12:40:20 +0100, Tim wrote:

Could anyone tell me whether it's OK to take a Brompton (folded) on tube
trains, including at peak times?

Yes, it's officially allowed. However, when doing so I have had some stick
from LU staff, including one guy at Paddington (Bakerloo) I think, who said
on the PA system when I was quite legitimately boarding a train with a
folded Brompton "Could the man who has just boarded the southbound service
get out at the next station as bicycles are not permitted on the Bakerloo
line". Needless to say, I didn't.

Be confident, know that you are right, and if that doesn't work just put it
in a bag before entering the network. It's then just luggage and there are
no rules (save common sense) about that.
--
Tom Sutch