well that was that lol!
took the FSO switch off and yet it still cuts out, will look at the fuel filter / pump etc next.
another possibilty is it has had an immobiliser fitted which requires the immob' key to be inserted at all times should it come out the car will cut out again - i suspect the socket may be faulty so will tottally remove it and see how it goes.
once again any good worthy alterations these respond well to?
mike