I have seen a few posts mentioning travel insurance.
Staysure are frequently recommended. A word of caution as I had a very poor experience with Staysure.
I had the misfortune to be hospitalised in the Far East with acute bronchitis. I had to stay in for 7 days. Hospital bill was around £8000 that I had to pay.
Staysure policies are administered by a company called Ergo Travel and claims dealt with by Davies Group. This is who you have to deal with. Staysure pass the buck to them. It took 4 months before the claim was settled and paid.
I was fortunate to have a higher credit limit on my card to pay the bill. Some people are not in this position.
I reported Staysure to the Financial Ombudsman and was awarded some compensation.