UK regulatory bodies and trade associations for insurers:

Association of British Insurers

Department of Trade and Industry

Finance & Leasing Association

Financial Services Authority

Insurance Ombudsman Bureau

Financial Services Compensation Scheme

UK regulatory bodies and trade associations for lenders:

Bank of England

Banking Ombudsman

British Bankers Association

Building Societies Association

Council of Mortgage Lenders

Useful sites for research into UK financial services:

Datamonitor

FTYourMoney

Insurance Times

MoneyWorld

National Statistics