We went with Vitalilty Health. You can't purchase (apparently) UK insurance until you're in the UK, but once we got settled in and had a bank to direct-debit from, we looked at a lot of plans. Vitality offered online GP consultations and prescriptions, and a number of discounts at local "healthy living" merchants, so we went with them. All the rest in our price range required you see the NHS GP first and all require you use the NHS emergency room for emergencies, and then they'd kick in and start paying. For my daughter, with every coverage Vitality offered, and no excess, the cost is just over 50 pounds a month. That's pretty similar to the others, maybe a bit less than some, that we looked at. The phone video consult option was very appealing.