Not so funny thing happened. Popped to shops, parked up, got shopping came back to car, fob worked to allow access, put blade key in ignition, turns 2 /3rds of way but not all the way to start the engine. (very annoying). lights on dash work, electric windows open, sunroof opens etc, but no engine start, chiming noise and flashing security light.
On way to the shops and whilst driving did note that there was an unfamiliar clicking noise to the left hand side backseating area of the car very similiar to the car doors locking themselves, which in fact did happen. i just rectified this when i stopped driving by pressing the open button on the key fob and got out of the car (didnt think anything of it - it never happening before). There was not anything that was pressing against the key fob whilst i was driving to have caused the clicking and the doors to lock by themselves.
Is this likely to be an immobiliser problem? I did go back to the car with the spare, which opened the doors but dead as a doornail for starting the engine!!
Also tried new battery in the key fob - didnt make any difference. Thought maybe flat battery to the engine.
Did get home. Very kind man who knew a bit about cars, took pity to help me out. He did something with a screwdriver under the bonnet at the front (towards the bottom) and started the engine. He said that because the car is auto, i was unlikely to stall so could get home, but once home the same problem would recur. The kind man wasnt sure what the problem could be, but thought maybe the ignition barrell needed changing or possibly an immobiliser problem.
Opinions welcomed. Worried sick about how much this is going to cost to resolve.
May have to sell for parts (a heart breaker)