 Born in Johannesburg in 1949, the son of James and Mary Mackay, he was educated at St Andrew’s College, Grahamstown, South Africa, and University of the Witwatersrand, Johannesburg, with BSc (Engineering) and BCom degrees.By raising its long-standing chief executive Mackay to chairman, SAB Miller was widely considered to have breached City convention and traditional corporate governance practices, which do not allow a chief executive to become chairman without a good explanation.Corporate governance codes also discourage the chairman being a full-time executive, as Mackay will be for a year.