Hi Wendy!
I use Access America when I travel as I seem to go to Central America a bit! But I found this article and hope it might help you
Frommers.com's Top 8 Travel Insurance Providers | Frommers.com
If you have to go private, here is another link for Blue Cross Blue Shield.
Florida Blue - Home
You can also check with your property insurance agent to see if they have any ideas for you as well as some of the people here from other countries. Barefoot from Canada comes to mind.send her a PM and I am certain she will respond. Though Canada is not your country, perhaps you can post something in the general discussion forum for other Great Britians to answer back...
Hope you find something you are comfortable with!
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