Upvote:1
I think key to the answer is "where I will take permanent residence." The moment you arrive in the UK you are technically still a resident of India. This will remain up until you take permanent residency in the UK. Just make sure your insurance applies up until that date, preferably some days after arriving in the UK just to be on the safe side.
If you need to deregister with the Indian authorities, simply ask to be deregistered on a future date. When I did this twice, this was possible.