update, just found the other 2 stroke kit supplier in the uk www.transformercycles.com
just had another look at this site, he used to put a warning on the site, that these kits are not legal on the road here. but i could not see it this time, i don,t think the law has changed though, we are not allowed free or cheap to run transport in the uk without a lot of hassle. legistration tax, test ect. look up frank auton legal egal bike what he went through. that should put you off.
he should not have done it, as it set a precedent. for the powers that be.