did you speak to Paul B at need2insure ??
He is well into his ford, has a couple of series ones's and is on a few of the sites, especially
www.seriesoneturbo.co.uk
You will be looking at a classic car policy with a limited mileage (example 2 - 5k a year) and will be able to use it anytime you like.
You wont earn NCD with the policy, or be able to use them as they will be used against you everyday car policy but he does take it into consideration iirc.
Trust me mate, Paul is a top guy, I was paying £185 a year fully comp, 5k value and 5k milage on an S1.
Give him a call and dont sounds like a race head geezer on the phone, more an appreciative ford lover.