Gear has become so cheap and available in the UK now that there is less and less reasons why anyone would bother getting involved in producing fakes.
However, people have scammed each other unintentionally by bringing in fakes from Thailand and Spanish Primo and giving it to their close colleagues at cost price. I got offered Primo by a friend at the gym which was a blatent rip-off. It was 3 in a box Schering Primo which is defnitely fake. He was selling it to me at the price he bought it for on vacation, but I told him he would be better off throwing it all in the bin.