HELP!! Defender TD5 fuel line problem...

[TC.kenya]

Hi All, We've been on the road for two months now on a road trip through southern africa in our td5 defender. We took the car in a few days ago for a sheduled minor service and now the car is turning but it won't start! Originally we thought the problem was with the fuel filter and the system had an airlock, as the fuel pump sounded normal and the pressure of fuel to the engine seemed fine. We fitted a brand new fuel filter and have tried all the priming techniques listed on the Land Rover forums. We are now being told the fuel pump has failed, as the pressure of fuel getting to the filter is very weak. But the fuel pump was replaced just before we left (with a brand new genuine pump!). Could it be possible that the fuel pump has failed due to continuous priming of the fuel line? Has anyone had a similar problem? we'd really appreciate any advice!!!