John King, Baron King of Wartnaby

King stepped down from his BA leadership role in 1993, but remained BA president emeritus. His interests included directorships at the Daily Telegraph, Spectator, headhunting company Norman Broadbent, and engineering firm Short Brothers.

Around the same time, British Airways was witnessing the emergence of rival; Richard Branson's Virgin Atlantic which began with one route and one Boeing 747 in 1984, and was emerging as a serious threat on some of BA's most lucrative routes. Following a highly publicised mercy mission to Iraq to fly home hostages who had been held by Saddam Hussein in 1991, King is reported to have told Marshall and his PA Director David Burnside to "do something about Branson". This began the campaign of "dirty tricks", for which Branson sued King and BA for libel in 1992. King countersued Branson with the case scheduled for trial in 1993. However, it was settled out of court, with BA paying damages to Branson of £500,000 and a further £110,000 to his airline; further, BA paid legal fees of up to £3 million.

Dubbed "Mrs. Thatcher's favourite businessman" he was chosen to prepare the loss-making nationalised flag carrier for privatisation. King joined British Airways in 1981 when the airline was losing in excess of £140m a year. By 1989, the airline was making a pre-tax profit of £268m. Some of King's major changes at the airline included removing 22,000 staff members, hiring Colin Marshall as CEO in 1983, removing older aircraft from the fleet, purchasing more modern and efficient airliners, and axing unprofitable routes. Within two years King had replaced over half of the BA board with his own appointees. When BA was privatised in 1987, the initial share offering was 11 times oversubscribed. His compensation as chairman rose from about £250,000 in 1988 to £669,350 (including a £220,000 bonus) in 1991. King was created a life peer as Baron King of Wartnaby, in the County of Leicestershire on 15 July 1983.

He became Chairman of Dennis Specialist Vehicles in 1970, and Babcock International in 1972. Babcock was acquired by FKI Electricals for £415 million in August 1987. King, Babcock chairman since 1972, became chairman of the new combined company, called FKI Babcock. He was knighted in 1979, and appointed Chairman of the National Enterprise Board in 1980 and, famously, taking over as head of British Airways (BA).

After the war King, moved to Canada for a time, before returning to England and building a factory on wasteland in Ferrybridge, Yorkshire to establish Ferrybridge Industries. After renaming it the Pollard Ball and Roller Bearing Company and producing millions of ball bearings per year, it grew to become a major operation spanning several continents (the third-largest ball-bearing business in the UK). After being forced to merge the business with another manufacturer, Ransome & Marles, as part of a government reorganisation of the ball bearing business, King sold it for £10m in 1968, netting some £3m personally.

King was married twice; first to Lorna Sykes (daughter of his first boss Arthur Sykes and sister-in-law of John Poulson) in 1941. The couple remained married until her death from cancer in 1969. King remarried in 1970 to Isabel Monckton, daughter of the 8th Viscount Galway.

King was born in Brentford, Middlesex. His father Albert had fought in the First World War, and later worked as a postman; his Irish mother Kathleen worked as a seamstress. He was the second of four children. He was reared on a small property attached to a public house in Dunsfold, Surrey. He left school in 1929 at the age of 12 without qualifications and started work in a local factory which produced vacuum cleaners, where his work included machining clamping stays, earning him the nickname "Clamping Stay King". His next job was with local businessman Arthur Sykes, as a car salesman (with duties including re-possessing cars from people who had failed to make the necessary payments) before setting up his own taxi business and acquiring a Ford cars sub-agency and naming it Whitehouse Motors. When the second World War broke out, the motor business folded, but by then King had diversified into more general engineering work and so prospered from defence contracts and making parts for aircraft. He benefited hugely from War Ministry contracts and was able to use rare American machine tools that he acquired under the Lend Lease programme.

John Leonard King, Baron King of Wartnaby (29 August 1917 – 12 July 2005) was a British businessman, who was noted for leading British Airways from an inefficient, nationalised company to one of the most successful airlines of recent times. This success was a flagship of Margaret Thatcher's privatisation programme. He was also directly involved with the "dirty tricks" campaign waged by British Airways against Virgin Atlantic.