Bruce at Bailey Aviation had hinted that there might be no charge for the service I have received, but once it was clear how much had been done, including valve clearance checks, the replacement of filters, the cleaning of my carburetter and even an oil change, I was sure that had to be wrong. But no, Paul Bailey said there would be no charge. He says they like to look after their own.
Massive thanks to Paul, who went on to give me some advice about fuelling etc. He is a thoroughly decent bloke.