New BBC boss Tony Hall on 'enormous responsibility'
2 April 2013 Last updated at 10:49 BST
Tony Hall has taken up his post as BBC director general, returning to the organisation he left in 2001.
Arriving at BBC Broadcasting House in central London, Lord Hall said: "It's an enormous responsibility being the 16th director general of the BBC.
"I'm very very proud indeed to be leading the BBC from this moment on."