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If you've seen Colin Firth's new film, The King's Speech, you'll know how George XI managed to keep his stammer under control.

The film gives an insight into the torment he went through whenever he had to speak publicly, and how he managed to deal with it.

Nicky Campbell takes calls from people who've beat the odds to control their stammering, and the therapists who've come up with sometimes surprising ways to help them.

Joining the discussion, Leys Geddes, chairman of the British Stammering Association, and Willie Botterill, a speech therapist at the Michael Palin Centre for Stammering Children.