Ford Galaxy Starting prob

[3R titanium]

I'm after some advise from all you piston headers out there.
I have a Ford Galaxy 1.9 TD (VW engine). Its being running fine, well pleased with it. But last night, I went to start it, it will start but then cuts out straight away. Theres plenty of fuel, not waxed, plenty of anti freeze. It starts straight away, then cuts out?????
Please help

Thanks

Simon