Well I've just drop the boat back to the dealer and he assures me that the problem will be found and fixed. He too feels that it's a fuel problem, he was nice about it all and assured me that it wasn't my fault.
The mechanics are back on Monday so I guess I won't know the exact problem till then. I guess problems do occur and can only hope that this is a once off issue, I don't wish to experince a long chain of problems.
Judging from everyone's posts new boat issues are common, so long as no one gets hurt I suppose things could be worse!
Cheers
David