The BBC is a public service broadcaster and strictly non-commercial. Brands are therefore unable to advertise on-screen on any BBC channel by way of spot advertising, ad-funded programming, sponsorship stings or Product Placement. Aside from programme content, the BBC viewing experience comprises purely of programming and promotion for BBC programming, BBC-associated public services/charities or the BBC brand. The only way brands are able to actively gain exposure on BBC programming is by means of Prop Placement, as described in more detail here. All BBC programmes aside from News programmes are permitted to use brands on screen providing they adhere to Ofcom regulations, some of which are summarised here.