Car Insurance

This is probably the most sophisticated mortgage, loan and credit card comparison software available in the UK. Over 4000 Mortgages, 400 Loans and 300 Credit Cards are listed.
http://www.moneysupermarket.com/

The Association of British Insurers

This site offers extensive practical advice helping you get the best deal and ensuring your insurer honours their promises.
http://www.abi.org.uk/

Aon

Aon Private Clients is a specialist broker dedicated to providing insurance services for owners of high value assets and valuables.

http://www.aon.com/