Radio 4 is being encouraged to reach beyond its largely white, better off, southern audience by the BBC Trust. But you say don't change a thing. Roger Bolton unpicks the BBC Trust's report on Radio's 3, 4 and 7.

Listener Sasha Lubetkin visits the British Museum and the BBC's pronunciation unit to find out more about the BBC's role as defender of the English language.

Are The Archers getting too cosy with the Palace?

Producer: Karen Pirie