MACKENZIE, 58: PIANIST
FAMILY: Husband and two children.
CAREER: Chief executive of Business in the Community. Helped launch broadband at BT. First woman on the executive committee at Aviva. Non-executive director Lloyds Banking Group.
HOBBIES: Playing the piano, baking.
CAR: Hybrid Volvo. IDEAL DINNER PARTY GUESTS: Elizabeth I & II and Sir Christopher Wren.