Pally83,
Thanks for your suggestion of the Post Office. Just been having terrible trouble getting contents insurance on a house I've just moved into and wanting to include two road bikes. First of all, half the insurers wouldn't insure the property because there's a 'flood risk' (according to the environment agency, the house couldn't flood), then those that would wanted to charge £300-400 to insure the bikes.
Post Office total premium including bikes at £2,700 and £1,050, was £250. Job done.
Thanks again for the suggestion!
Nick