Looking for Insurance policy to share between two cars

[Andy625uk]

I have a 94 T-bird that I use for 4-5 months during the summer, and a Volvo that I use the rest of the time. At the moment I have a policy running for each of the cars all year round.

Just wondered whether anyone knows of a company that would let me have one policy, and switch it between the two cars 2 or 3 times a year without incurring a ridiculously high charge to dwitch them over ? Whichever car wasn't being used would be garaged off road.

At the moment I'm paying £200 for insurance on the T-bird, and the car is garaged for most of the year.