A private company must have at least one director and a public company two: sec152 CA 2006. There is no statutory maximum number of directors. At least one director must be a natural person: sec155. A person aged 16 or under cannot be a director: sec157.
Since April 2008 there is no requirement for a private company to have a company secretary, although one can still be appointed.
The Model Articles (for companies registered after 1.10.2009) provide that the minimum number shall be one director.
Table A, article 64 provides that unless otherwise determined by ordinary resolution, the number of directors (other than alternate directors) shall not be subject to any maximum but shall be not less than two.