Dave
There are a range of medical insurances you can get, all are with the usual levy factors. One factor is age, at present you are unlikely to get "reasonably cover" if you are over 64.
I am aware of something possibly coming, it will be much better, but it is early days.
I must point out I have no knowledge of insurance or medical matters, nor do I have any commercial interests.
Subject to outside factors, it is hoped that a "marketing survey" will be done soon.
I trust this is of help.