pingu

I have read a few threads on this site and also the DVLA but was wondering what is the smallest number plate I could get away with eg PC Plod driving behind me and accepts my plate as passable.

A few of my mates have one liners which are clearly illegal yet have never been pulled but I would rather not be riding thinking I could get pulled at any moment.

Is the stock plate the smallest legal plate?

Thanks

Pingu