Cycle number plates

On 19/06/2011 17:03, NM wrote:

I am assured, from previous discussion, that it's totally impractical
for cyclists to display a rear number plate, the fixings will be
wrong, it's too big, etc etc etc. Yet to my surprise I saw quite a few
cyclists who have entered "Ride across England" I'm not sure if it's a
race or just a way of blocking the roads but somehow they all managed
to be sporting a number plate on the rear which was as big or bigger
than any I have seen on a UK moped. How can this be?

There are two types of registration plate.