Good plugs for all your various sponsors guys but HSE tested tanks are the only ones legal for use on the mainland UK, Nitro Duck only make DOT tested bottles. This was all covered in previous threads DOT v HSE and all the ways in which their use of either system of testing is legal or not. Only one maker (supplier really) make a dual tested tank and that is WDP. Smart Parts Europe will sell you either type of tank, to be honest I don't know about London Paintball supplies as to if they do both types. But either way keep it legal. The main reason shops will sell DOT over here is cos it is legal to sell them , legal to own....but illegal to use (use means fill btw not just limited to fixing to your marker)
Getting a little fed up with this rant...cos it keeps coming up, so perhaps Bully or some one from the UKPSF committee can post on this thread just so at the very least it doesn't look like I'm making this up.