In my experience all this stuff usually gets lost in the system. I’ve had stuff where I get a copy of the letter they’ve sent to the GP, but on talking to the GP later they have no evidence of it.
Hospitals don’t talk to other hospitals either. Have had a smash in one place and was given all the stuff, including x-rays on a CD, to take to my local A&E which I had to book in as a fresh patient to then get into the system to get a referral to the fracture clinic. Could have gone to my GP but it would have taken 3 weeks to get an appointment for them to then do a referral.
There’s no standard means of communication between parts of the NHS, especially in different areas. There was a plan to centralise everything but people protested about privacy and then the gov went ahead anyway and the project was overspent and went tits up so was scrapped.