hello mate, Turnips dad here. I am assuming its a generation 2 engine?
Now only try this if you are completely happy you can do it without injuring yourself or causing damage to the engine.
remove the intake pipework (particularly the plastic pipework) after the air filter, now get a small gas torch and while someone turns over the engine apply the flame into the inlet manifold. if the vehicle starts immediately then it is more than likely an electrically associated cold start problem, if the engine stumbles for a few seconds this is ok provided it is only a few seconds. Effectively you are bypassing the electrical side of the electric cold start facility.
If it still fails to start immediately then you need to check the timing and cylinder compressions (diesels need a higher reading compression tester)
Never use easy start, due to the octane rating it causes the piston rings to stick into the ring lands. this is why it is sometimes said that "engines seem to get addicted to easy-start."