The NHS is brilliant is you have an emergency, but currently a disaster area if your treatment isn't for an emergency
As part of the mrs Long Covid tests, we had to buy a blood-pressure monitor for her to keep an eye on what was going. Hers was fine, but she had a quick check of mine and it was scarily high. Kept an eye on it for a few days, and it remained high so phoned the GP at 8am on a Friday, and booked a telephone consultation. GP phoned just after 9, got me into the surgery before 12 for bloods and some tests, results back on Tuesday (bloods all good), GP phoned me and started me on meds for blood pressure straight away. Free prescription too, up here!
Don't feel any different, but my blood pressure has dropped back down to normal levels within a few days thankfully.
My first interaction with the GP for over ten years, all done very efficiently in my opinion, but I know there will be many other cases similar to yours.
My mother had her cataracts done last year (in Bristol hospital I think), one eye at a time, in-and-out in 30 minutes and is more than happy with the results - hope you get yours sorted as easily.