Anthonym, I'm sorry, I should have said it was a CSR260, which was mentioned on my earlier posting. Think I've finally got it resolved after drilling the heads off the two screws in the spinning rivnuts I got the pump out. Have subsequently found out that it is only obsolete with Caterham but was fitted to the MG ZS amongst a number of other vehicles. The part number if anyone else is looking for one is WFX100631 which is available from a number of different manufacturers but was concerned that one for a Berlingo may not have the correct flow rate. Decided to buy from Rimmer who, although more expensive, are at least recognised Rover spares suppliers. Despite having hard wired it from the battery twice, with no response, I connected it up again when it was out and it ran! I had to shake it to get rid of the fuel from the swirl pot which may have freed off a sticky pump. In any case I don't want to get stuck again in the middle of nowhere so fitted the new pump and the car is now running fine. Haven't resolved the issue of the two spinning rivnuts which have still got the remnants of the screws in them despite attacking them with screw extractors with mole grips holding them inside the tank. Reluctant to do any more drilling on the fuel tank so have used Hylomar blue to seal them. If I have to I'll drill out the existing rivnuts and fit two new ones.