Unilever Prezi

Here is a link to the BCAP code from the ASA which specifies what can and cannot be included in UK TV adverts.

Here is a link to Ofcom's broadcasting code - this specifies more generally about what can be shown on UK TV.

History of the Code
The Code came into force in May 2005 and was initially drawn up to replace the codes Ofcom had inherited from its predecessors – including the Broadcasting Standards Commission and the Independent Television Commission.
It had to take into account the dramatic changes that had affected TV and radio. The UK was no longer a country with just four or five TV stations and the majority of homes now had access to many more digital TV and radio channels.
The Code was drawn up following extensive research amongst viewers, listeners and broadcasters – and we received more than 900 responses to our public consultation.
Since 2005 the Code has been revised on a number occasions, including clarifying rules around audience competitions and voting, the broadcast of sexual material rules and product placement.
(http://consumers.ofcom.org.uk/tv-radio/television/the-broadcasting-code/)