Hi all, the fuel tank proved to be a little tricky, there is no need to remove the back seat. I had to remove the rear side inner panel to disconnect the filler pipes. Then it was all under the car to drop the tank. It was a pain in the arse fishing under the mastic under the rear seat for the fuel tank wires as haynes comic recommends but i did find some interesting corrosion which is now no longer there praise the hammerite!! actually changing the sender was easy enough, if a little tricky with 3 loose tank studs, but with a cleft stroke with a junior hacksaw and flat bladed screw driver got it sorted. I did have to hastily redress the next door neighbour when he's offer of the use of he's blow torch "to loosen then studs!!!". But still there we go, i do now have a working fuel gauge, thanks all for your help, shagmeister