It’s been a while since a reminder about this, so:
PLEASE fit a full-length rear guard before coming on a wet club-run. Even if it’s not raining, wet and/or muddy roads make it pretty unpleasant to ride behind a bare back wheel.
Have a read here – there is lots of other good tips there too: http://www.didcotphoenix.co.uk/downloads/clubrunguidelines.pdf
Thanks, and Happy New Year!