The short answer is you arent strictly allowed to do anything.
To be *entirely* legal you need to have a machine that passes the SVA, have a UK driving licence and insurance for the bike.
However provided you are *extremely* careful to respect the rules of the road, you DONT EVER ride on the pavements, nor allow someone else to do so, and keep to safe speeds the police should not bother you.
I have to say that I would prefer that you wait because if something does happen then the police and the 'think of the children' squad will try and stamp on us for no better reason than they can. Right now we are either not noticed or generally ignored. A couple of accidents and this could soon change.
that is the position as it stands at the moment..
Jemma xx