I worked for the NHS and then for one of the better known private hospitals.
I would never go to a private hospital unless it was undertaking NHS work.
That doesn't mean I would never use private medicine, but it would be a private ward in an NHS hospital.
Wen my dad got his appointment for a hip replacement and he was offered a place in a private hospital my mum was really pleased, I went straight to emailing the hospital asking questions about staffing levels.
Now private hospitals all have a Dr in the hospital 24 hours a day. They are usually registrars in the NHS and take the work on for a bit of easy cash.
The hospital I worked at had a maternity ward so the Dr they had on site was an obstetrician, which might not be ideal if you have a stroke post op.
Private hospitals do not need to have 24 hour nursing staff either so if you start to bleed out after an op you may find a HCA is not the best person to deal with it.
The advantages are of course a private room, nicer food, the option of ordering an alcoholic drink, nice toiletries.
You also get to be seen by a consultant and that is the person who will carry out any procedures.
Staff are less stressed and, where I worked, all patient appointments were 1 hour whereas in the NHS you may have something like a pacemaker clinic where each patient has a 15 min appointment with no gaps in between.
In the private hospital I might have 1 patient for a pacemaker check up and then the next patient would be there for an echo.
Another thing that happened when I was working in a private hospital was that a student was promoted to physiologist, now in the NHS that CANNOT happen, you need to complete the training before you get the job.
So in summary, for anything routine, you will have a nicer stay, if anything goes wrong you may be shipped back to the NHS and you may have to pay for that NHS treatment.
So before going in to a private hospital ask relevant questions
How many qualified nurses and Drs are in the hospital over night? Where did they train? By this I mean what country?
What specialty do these staff have?
What happens in an emergency?
Oh another thing that happened in the private place was 'private nurses' so a patient would be in hospital and have a nurse with them, just for them.
Mostly these were Kiwis who would bring a book because the hospital nurses did all the nursing and in the case of some patients there was also a maid to help with dressing.
I'm not sure how it would go down in the NHS if you turned up with your own nurse.