The Queen officially opens BBC's new Broadcasting House
The Queen has officially opened the BBC's rebuilt Broadcasting House, creating a memorable TV moment when she appeared behind the newsreaders on air.
She had earlier made a live broadcast on BBC Radio 4, in which she said it was a "great pleasure" to see the BBC's new central London headquarters.
During a tour of the building, she met many of the BBC's biggest names.
The Duke of Edinburgh had also been expected to attend, but was admitted to hospital on Thursday for an operation.
Luisa Baldini reports.