Thanks for all the replys. Fitted a new cam sensor(and battery) saturday, this seems to have eased the problem although it did go into limp home mode going home from the garage when really pushed. Have used it since then and there is a definite improvment, can accelerate through the revs without it cutting out, BUT hav`nt really put it under pressure since it went saturday, owing to the snow. Will give it another go tomorrow and see what happens.