That sounds like the immobilizer has kicked in.

Agreed, hence the ecu question.

Done nothing to ecu .. Thus is not the 2 car its been into ... It was working yesterday .. Just no spark... And had alarm earlier

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And without Press the alarm button with key in. It don't ever turn over.. When I press button it turns and almost goes

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My immobiliser does that intermittently, it will crank but won't fire.

OK who knows know the immobiliser work.. What does it stop? Ignition? Fuel pump? ..Cuz I've had the injectors out and they not injecting .. When I turn the key I can hear the pump priming then first turn I get fuel (explains the almost firing) but then nothing ... Is this defo immobiliser or could it be something else

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If it's immobilized it won't turn over, it'll just make the beeping noise.

So it primes which gives you enough fuel to fire then no fuel !, odd one, how much fuel is in the tank?.

It does sound like the immoboliser.
Battery may also be low causing the locking problems.
Until you get it starting just lock the car with the key in the door.

Which ECU are you running?

To check fuel can you jump a fused wire from the battery to the fuel pump?
(If it is an early mk1 there is a cover under the boot to acess the pump).

yes i get 1 squirt and then nothing,, and i put a can full in ,about £8, the needle has moved off empty above red line, , when i touch the earth to what i assume is priming the pump ,, i can hear it ,,

after a tryin the button on fob 50 times i gave up , put it down after a while i went back to it and it works,, but then stopped after a few times, but im not getting the beepin now when i put key in,, battery is slowing being drained tbh with all the cranking ,,, i dont know what ecu it is , came with the engine from the 620ti i think, is silver box with 1 plug if that helps