The Ofcom Broadcasting Code
The Ofcom Broadcasting Code ("the Code"), the most recent version of which took effect on 21 March 2013, covers all programmes broadcast on or after 21 March 2013. The Code Guidance can be found here http://stakeholders.ofcom.org.uk/broadcasting/guidance/programme-guidance/bguidance/.
Programmes broadcast prior to 21 March 2013 are covered by the version of the Code that was in force at the date of broadcast. Previous versions of the Code can be found here http://stakeholders.ofcom.org.uk/broadcasting/broadcast-codes/.