UK: The Davidson Interview - Bill Castell.

The Nycomed Amersham boss positively fizzes with energy. At work, his exuberance is reined in by the board. At home, it's his wife who keeps his feet firmly on the ground, says Andrew Davidson, restraining him from dashing round buying estates in Scotland, pleasure boats and gin palaces.

Up in the stripped-wood, glass-walled, halogen-spotted modernity of Nycomed Amersham's second-floor, senior executive suite, Bill Castell is looking rather defensive. An ambitious, exuberant, loquacious man, Castell appears to have been brought up short by what I had thought was a rather innocuous question. Tell me about the Prince's Trust then?