Advertising Standards Authority is the self-regulatory body for broadcast and non-broadcast advertising.
http://www.asa.org.uk/
British Board of Film Classification is the independent body, responsible for classifying films and videos.
http://www.bbfc.co.uk/
Committee of Advertising Practice
www.cap.org.uk
Charity Commission is responsible for registering and regulating UK charities.
http://www.charity-commission.gov.uk/
Department of Culture, Media and Sport is responsible for issues relating to culture, media and sport. This extends to gambling policy.
http://www.culture.gov.uk/
Department of Trade and Industry is responsible for economic development and competitiveness.
http://www.dti.gov.uk/
Financial Services Authority is responsible for financial services regulation.
http://www.fsa.gov.uk/
Home Office is responsible for internal affairs in the UK. This extends to child safety and the internet.
http://www.homeoffice.gov.uk/
Information Commissioner's Office (ICO) is responsible for enforcing data protection and freedom of information legislation.
http://www.informationcommissioner.gov.uk/
Internet Watch Foundation addresses, through its hotline, the problem of illegal material on the internet, with particular reference to child pornography.
http://www.iwf.org.uk/
Office of Communications (Ofcom) is the UK's communications regulator.
http://www.ofcom.org.uk/
Office of Fair Trading is responsible for fair trading in the UK.
http://www.oft.gov.uk/
Press Complaints Commission is the self-regulatory body which oversees the editorial content of newspapers and magazines.
http://www.pcc.org.uk/