Before we came to live in Turkey we took out a plan with 'Aplan'
this covered travel insurance for long stay (12months) until we got sorted.
the one stipulation was that we had a UK address, also we tailored the insurance to suit us, taking the medical only as we already had travel insurance for the first 6 weeks stay.
Another clause we opted for was not to return to the UK in the first 12 months, if we did we negated our insurance.
I have had a look at the website and see that you an now opt for 6 month cover which is travel and medical. it is pricey at approx £200 but well worth it.
http://www.citybond.co.uk/index.jsp?agtintref=APL03When we settled for our 2nd year I took out a policy with Aviva in Fethiye, as we were both under 60 (at the time) the insurance was approx 486TL for the year (for both of us).