The immobliser is switching off ok on this one Tony,they do give a lot of trouble on these alright do,

Matt,
I ran a direct supply of good diesel through the pump until it was returning through the back flow and it made no attempt to start.

I would be surprised if it them injectors are opening,there is no smoke coming from the van when its turning over,

I could try a test injector on the pipe just to see do,

My neighbor have the same van i could try his ecu on this and see what happens the other garage already put 2 injector pumps on this,
There cant be much more (that i can think of left)unless i am missing some thing

I appreciate your taughts on it, thanks