Re: A few questions for londoners
You don’t have to have health insurance, assuming you are moving to the UK permanently.
http://www.nhsdirect.nhs.uk/articles/article.aspx?articleId=1087
Anyone taking up or resuming permanent residence in the UK is entitled to free National Health Service (NHS) hospital treatment in England. If you intend to live permanently in the UK you will be exempt from hospital charges from the date of your arrival in the country, but you should expect to be asked to prove your intention and that you’re legally entitled to live here. This exemption applies to your spouse and children (under the age of 16, or 19 if in further education) if they are living here with you on a permanent basis.