Queen and Duke of Edinburgh visit 10 Downing Street
The Queen and the Duke of Edinburgh have made a rare visit to Downing Street - thought to be their first since 2002.
David and Samantha Cameron were hosting a lunch to celebrate the Duke's recent 90th birthday.
Mr and Mrs Cameron greeted their guests outside Number 10, with the prime minister calling it "a very proud day".
Nicolas Witchell reports.
- BBC News