Helen, can I suggest that you do what I did and that is to go to your Doctor and ask him to print out your surgery medical record. it is a one line document per problem i.e. broke a leg and date. So it is not a mind blowing list of ailments. Then get him to cross through those items you do not have to inform the insurance company off, normally because they are no longer relevant.
Having done that then enter the list on any Insurance Company website and it will give you an accurate quote. Make sure you INCLUDE your ailments and not EXCLUDE them. If you exclude them your insurance is not worth taking out, that is my wife's view, who works in Insurance and has done for 30 years now.
Hope this helps we are to sunny Spain at the end of March.
Kindest regards – vasbyte
David