My continued experience with the NHS is the sense that, no one is listening or fixing.
If at all possible go private, tell them what you want investigating and fixing.
A national health hospital is not going to cure you for, “A patient cured is a customer lost!; Instead, of fixing you, “Big farmer” will crudely manage your symptoms, with drugs, at a cost and send you home in prolonged agony.
It’s a lucrative carousel !