In message , at 21:12:22 on Mon,
6 Sep 2004, Mike Bristow remarked:
A good question is: who would prosecute a cyclist for passing a sign
that said "No Entry - Except Cyclists" (in this instance it allows
access to a contra-flow solid-line cycle lane on an otherwise one-way
street). But the Cambridge city fathers seem convinced that someone
would get cross with them if they put up a sign which wasn't in the
book.

http://www.highwaycode.gov.uk/sign071.shtml

means 'Route to be used by pedal cycles only'.

Next!

Except I don't think that would apply to a full-blown road. You need a
"no entry" to stop the motorised traffic.
--
Roland Perry