In Belgium I paid 37 Euros (25 quid) for a check-up, but I got 85% back so it cost me 3.75 pounds.
I called the dentist on a Thursday and got in on Monday. She was efficient, open and good. Recommended that I keep an eye on my crowns (I smashed my front teeth out in a bike crash years ago) and sent me away telling me she will cal me againin 6 months.
That's how it used to be in Britain, near enough. Someone has messed up pretty badly.