Answer:

To find out if you are eligible to buy a UK policy you will need to speak to your insurer. Each insurer has their own rules for buying a UK health insurance policy.  Do you spend much of your time abroad or have you only just moved to the UK?  It is advisable to check whether there are limitations to the days spent outside of the UK, or whether you need to be registered with a NHS GP for a specific time period prior to buying a policy.

If you do not meet the UK criteria, you will have the option of international private medical insurance.