I've lived years north of Watford (mainly in Yorkshire & N-u-T), so have become slightly aware of the exotic tastes & meal times there.
Tea-time-wise, I've spent many an hour at one or other of the
http://www.bettys.co.uk/">Betty's and can vouch for their fancies & teas (although I don't recall them ever serving cucumber sandwiches).
BW.
JimC