[excession]

Well so far as I understand it poker playing (even full time) is not considered a trade/profession under UK tax law.

Now it may be that bonuses, rakeback and stuff like FPP prizes is viewed differently from pure winnings but if it is haven't heard of it.

If you won the WSOP you definitely pay no tax on the winnings. If you 'win' a car thru playing poker unless it is obtained through the pursuit of a trade of profession the same applies.