Queen celebrates National Theatre's 50th birthday

The National Theatre on London's Southbank has been delighting audiences and critics with the best of British talent for decades.

Over the last 50 years stars like Dame Judi Dench and Sir Michael Gambon have helped bring more than 800 productions to the stage. And today to celebrate its golden birthday, the Queen and the Duke of Edinburgh visited the theatre for a backstage tour. Sangeeta Kandola reports.