Ed
You may want to contact Hagerty Insurance, about insurance for your British bike.
I tried to get collector insurance on the R65, and I was told, the bike has to be worth in excess of around $5000, so my R65 fell real short in that respect.
I've had Hagerty insure my '79 Trans Am for the last 5 years, and I am quite satisfied with them.
I'm not sure on any restrictions they may have on useage, but I don't think you put too many miles on it.
Just in case you don't know, non-collector insurance will only pay about what the Kelley Bluebook value is, unless you have an official appraisal on file with your insurance company, and have a set value incase of damage or total loss.