Hi. Sorry to hear of your trouble. Here's a few thoughts which might lead to a solution.
Have you had any difficulty with the starter motor? If its on its way out, starting will (usually) gradually become more difficult.
Does disalarming actually turn-off the immobiliser? (there is a solution on this forum, I dont have the MKII instructions)
Have you just replaced the batteries in the fob?
Have you had the car battery disconnected?
Are all the battery/starter leads as tight as possible?
Is the gearbox fully in park? Try it in neutral.
Are the fuses under the bonnet in good order?
Have you searched this forum, and the engine one, for a similar problem/solution?
Hope you get on ok, please let us know.
sorry about not repleying earlyier iam dysclexcak and have trouble writing, so computers are new to me and diden`t know which butones to press to send a replay too. ive updated my oragenal questionton to make it moor clear. thanks for the input steve hope too hear from you soon.