Hi guys and thanks for the quick reply...
I decided to get the AA out and have a good look over the car.... There report was possibly the radiator had gone.... They offered a pressure test or they would take it to a local garage for me as the breakdown repair (parts and labour paid by them upto £500) that I have with them would not come into effect for 14 days as it's a new car to the policy....
I took it to the local garage who pressure tested it twice as there was false readings..
The garages report was the head had gone.... Bang goes £600 from bank account....
Luckily the person I purchased it from on Monday is willing to give me a
FULL refund and take the vehicle away and aucion it locally....
A greatshame as I fell in love with the vehicle...
Oh well back to square one and searching again......
Once again THANKS for all your help an quick responses and I would definately recommend this forum o anyone with an omega....
Hopefully I can get another omega butbif not it will b a vectra...

I took the option of towing to a local garage