it will be best to bleed the system, otherwise you could be a while.
did you use the disco (if it was a disco engine) fuel filter housing? if so on the top is a small bolt, this is the bleed screw, undo this, then use the lift pump (side of block by oil filter) to pump fuel upto the injectors. you will know when it gets there, as you will get some fuel out of the filter housing bolt.
the other way is to "crack" the top of the injector pipes open. at the top where the metal pipes go in there is a big nut IIRC 17 or 19mm, undo these a bit, then repeat the procedure with the lift pump until fuel comes out. the engine should start then, just make sure to tighten everything back up.