I know my insurance only covers me for the first 90 days I'm in the country, so I have to get a Swiss policy in um a month and a half
Mind you, I'll be expecting a refund from the UK insurers for the 9 months that I won't be using, given that when I took the policy out I told them I'd be moving to Switzerland and ALL my driving would be there - they were happy to take the cash in that knowledge, so they can happily give some back when I cancel it
I also spoke to the AA about extending my cover with them to Europe, they gave me the Charles Bronson (no dice) so at the moment I'm relying on my ages old student Barclaycard cover to keep me out of motor trouble should the worst happen...(!)