It depends what engine is in it, the V6 is very robust but it depends what the servicing has been like. Is there any knocking noises when the engine is running?
It starts (almost) then sounds like a tin can full of nails, and knowing very little about engines I can probably guess this is not a good sign.
The AA guy simply heard my story, listened to it running and reckoned the engine was starved of oil and as such would have most likely rendered it useless with a load of bent bits and bobs now rattling about!. To be honest, I wouldn't attempt to have it repaired as I've spent a lot of money on the car so far and couldn't stomach putting any more out on it. I know I might sound a little defeated, but my wife is disabled and receives the mobility allowance so we're taking the sensible route now and going for a 3 year lease which covers us for most eventualities, I just thank god she wasn't in the car at the time!.
The AA guy went on to explain that it could have been a pump issue or a blockage/clog etc which restricted the oil - just wanted to add this in case anyone thinks I'm a complete numpty and didn't have oil in it

I'll be honest also guys, if anyone is on the lookout for such a car I'd welcome any sensible offer but I don't want to go on about selling it here as I don't think it's the right place to do so, just let me know if anyone thinks they may be interested and I'll oblige with any additional info you may need