Jack Dee is planning to spend hours balancing on top of a 50ft pole, despite suffering from vertigo.

The comic will stand on a 2ft-wide platform outside BBC TV Centre in West London to raise money for Comic Relief.

The stunt mirrors American street magician David Blaine, who stood on a 100ft pole in New York for 48 hours.

Jack, who reluctantly appeared in the first Celebrity Big Brother in aid of the charity, told Michael Parkinson: "Someone's decided it's amusing for me to be in unpleasant situations, and they'll pay good money to see it happen."

The 40-year-old stand-up will be sponsored for every hour he stays up the pole, The Sun reports.