Hi Guys,
Apologies for my absence, but I have been awaiting the results of running the car.
Frank, it looks as though you were right - thanks!
After dropping the sump and checkiong the bottom end and searching for any play in the conrods, I put it all back together and ran it. Initially the same racket and then suddenly cleared up! I took it for a diagnostic check and the garage found nothing - it ran perfectly while there and has done so ever since. Hoping that I have not put the kiss of death on it by writing this, all seems well and has been so for about the last week. So, unless anything else emerges, it looks as though dodgy fuel might have been the problem - it just took a while to clear. One to put down to experience!
