In reply to donuthead8:
My BMC insurance from a couple of weeks ago came with a "Terms of Business" information document from PJ Hayman, which is the same insurer the BMC are currently recommending on their page:
So I would probably start there as it's likely to be exactly the same. Might be worth ringing either the BMC office or PJ Hayman and working out whether you're entitled to a discount as a BMC member that would otherwise have been applied when ordering via the BMC website.