Question Author
Thanks for the replies. If I can get my circadian rhythm problems under control, I hope to be making multiple GP visits, as there is a string of things to sort out.
No-one has commented on the main question, about surgeries charging per individual tag, so I'm leaving BA open for the time being. All worthy answers, so far.
@Sqad
Yes, I'd just read the other thread, where stitching was mentioned and that caused me to abbreviate what I wrote. I didn't mean to imply that would be the outcome.