Normally UK insurance companies do not insure cars fully comp for more than 3 months abroad. However I had an old L-reg Rover and my insurance company said you I could keep it out of the country as long as I wanted and it'll be covered third party only. First thing is to call your insurance company and let them know the details. You may also want to think about European break-down cover too. You don't have to tell Switzerland, France, etc. that you are entering the country with your car. Checkout this too:
http://www.direct.gov.uk/en/Motoring...ance/DG_067624