Thanks for all the replies, here are my thoughts,
(1) Too late for those that said don't run the engine. Before I changed the oil I had a good look inside the new filter I had bought as a replacement and was pretty certain that the distortion of the old filter could not have caused any internal damage. The bottom part is just empty space.
(2) The modern filters are definitely made of thinner metal. I also remember older ones being much sturdier.
(3) I did consider the screwdriver through the filter idea,but that creates a problem. What happens if it does not work; you have the car up on ramps and a punctured filter which means you can't run the engine. Apart from that the limited access would make it difficult.
(4) Yes the lack of oil on the rubber seal when fitted seems to create this problem, but you don't expect professionals to omit this during an expensive service.
(5) The only answer is probably to pay up and let another professional gorilla do the next oil change. If I do that I will look for a place that does fixed price services in case they take a while to remove the bashed filter!
Doug
ps I will report back in a year after the next oil change If we are all still here!
Edited By Douglas Johnston on 12/09/2019 13:38:16