Happy New Year.
Well, here is the update.
Russell Walsh came exactly on time. Within 3o minutes, he had the head off and found the leak of coolant in #1 cyl.
Made further checks and put on the appropriate gasket.
Lovely bloke and happy to talk cars and answer all the questions I had about my TF.
Thanks to those on here who steered me towards mobile repair.
Been out for a drive and very happy with the work and price.
I'm back on the road.
This would not be so bad if I had not bought it from a well-known dealer who replaces head gaskets on new cars sold.