The Haynes Hawker Siddeley/BAe Harrier Manual will focus on the RAF's GR3 version that saw action in the Falklands War in 1982. The Hawker Siddeley/BAe Harrier, formally referred to as the 'Harrier' or colloquially as the 'Jump Jet', is a British-designed military jet combat aircraft capable of Vertical/Short Take-off and Landing (V/STOL) via thrust vectoring. The Harrier family is the only truly successful design of this type from the many that arose in the 1960s. The authors give detailed insights into the construction, operation and maintenance of the entire Harrier family, but with a particular focus on the RAF's GR3 Cold War warrior.