Comedian Ronnie Corbett has told how he has a habit of getting locked in the loo when he is at major events.

The 83-year-old star said it had happened at more than one royal occasion and during his most recent scare he had to be passed a screwdriver to free himself in time to give a reading at a memorial service.

The star also brushes off health fears on tonight's The Graham Norton Show on BBC1 after a report he was retiring due to illness.

Corbett told presenter Norton about his lavatorial disasters, explaining: "I have been trapped in some posh toilets including those in Windsor Castle and Buckingham Palace, and at Victor Spinetti's memorial at St Paul's Covent Garden, I got locked in the loo.

"I had to scream and shout and eventually someone threw a screwdriver over the door and luckily I was out in time for my reading."