See Section 15: Interacting with our Audiences of the Editorial Guidelines.
Interactivity allows our audiences to engage with us in many different ways. It provides choice and gives opportunities to be heard, and to create content. We aim to offer it to everyone by using our different platforms in different ways, but we will not exclude viewers and listeners who do not choose to interact.
For guidance on mobile devices, see Section 15 of the Editorial Guidelines and the Advice Note on Mobile Devices.