Thank you all for your replies..

Colin we did replace the radiator to no avail..
In fact replaced thermostat and water pump twice with genuine.
After mutual agreement with the customer we gave up with 199,000 miles and 10 years old wasn't worth going an further. Some you win some you don't.

Sorry haven't got back sooner as I have been a man short and trying to multi task...

Merry Xmas to all and sundrie