Thanks for the reply. Just to clarify though, I had separate house & car insurance, & also some valuable collectibles which weren't covered under the household insurance due to value. I notified all 3 insurers of my conviction, & slightly bizarrely the house & car insurance companies weren't bothered at all, whereas the insurer of the other (small) policy said they couldn't insure me any more & cancelled the policy.
So now, if I want to make an effort with the management of the flats, I don't wish to have to disclose to the other leaseholders that I had insurance refused, but equally importantly is should a claim be made for all of them, that the company refuse to pay out because they discover that I had insurance cancelled years ago. At the moment it's not an issue because I'm not named in the management of them, but in many ways it would make no sense to the others why I'd refuse to join the management.