Thanks for the advice. I went flying in my new aircraft for the first time on Monday but 30 minutes after leaving Beccles we had a smell of fuel in the cockpit so made a diversion to Norwich. The aircraft is now stranded at Norwich for repairs but, with luck, I should have it back at the end of the week. A leak has been found where the fuel outlet pipe fitting screws into the tank so we definitely made the right decision not to carry on flying.