Honestly Dave YD - who gives a fuck what most of the chumps on here say.
Unlucky you got caught out matey - we have all done some pretty interesting things in our cars that the law wouldn't approve of. I think u will be lucky and not hear anything more about it. Good way to learn the lesson tho!
I once drove my car with no insurance and no tax (it was laying up in the garage whilst I was broke) the rozzers walked past it at 1am and clocked the lack of tax (why oh why didn't I just park it somewhere less obvious lol) - it caused me quite alot of hard work to get away with it but I managed.
Lesson firmly learned.
Good luck and try n keep ur nose clean
RW