You should get your friend to read this http://www.hmrc.gov.uk/MANUALS/BIMMANUAL/BIM22017.htm he is not liable to pay tax assuming he is using spreadbetting.
QuoteDislikedThe fact that a taxpayer has a system by which they place their bets, or that they are sufficiently successful to earn a living by gambling does not make their activities a trade.
The case of Graham v Green [1925] 9TC309 concerned a man whose sole means of livelihood came from betting on horses at starting prices. Rowlatt J says at pages 313 and 314:...............
DislikedI'm not going to name a friend on a free bb, I know it's true and so does he, nothing to prove. Ok then pal, call the tax office, then get the tax back for my friend, he will buy you a new car, he's been taxed the last 3 years since he was classified as a professional trader. Professional deems you taxable at sourceIm not on about a 5 or 10pp gambler, I'm on about the real deal DA trader.
Oh ye, the website you mention is dead, they must have gone bankrupt for not paying their taxes....:OIgnored