Happy birthday to MacSporran. Sorry it's a bit late. Just logged on. ??
Soop no matter where you had your op, private hospital or NHS, there should be a record in your notes at your GP surgery. Considering it was quite a while ago, there would probably be a written letter which should have been filed in your Lloyd George notes. As previously mentioned, you are entitled to look at your notes but may need to put your request in writing. You could try explaining the situation to your GP's secretary and ask her if she would look in your notes for you. Either way, whether you find it yourself or she does, you should be able to obtain a copy of the letter/s, discharge summary etc which the consultant would have written to your then GP following your discharge from hospital. All operations, outpatient appointments etc whether private or NHS should be recorded in your notes in your GP's surgery.
Hope you find what you are looking for.