McDonnell Douglas Phantom in UK service

The McDonnell Douglas F-4 Phantom II was one of the principal combat aircraft of the United Kingdom (UK) from 1968 to 1992. The UK was the first export customer for the US-built F-4 Phantom, which was ordered amid political and economic difficulties that afflicted British designs for similar aircraft. The Phantom was procured to fill several roles with the Royal Navy's Fleet Air Arm and the Royal Air Force (RAF), including air defence, close air support, low-level attack and tactical reconnaissance.

Most Phantoms operated by the UK were built as a special batch containing British technology, an effort to support the British aerospace industry after major project cancellations. Two variants were initially built for the UK: the F-4K variant, designed from the outset as an air-defence interceptor to be operated by the Fleet Air Arm from the Royal Navy's aircraft carriers; and the F-4M version, operated by the RAF in tactical strike and reconnaissance roles. In the mid-1980s, a third Phantom variant was obtained when 15 second-hand F-4J aircraft were purchased to augment the UK's air defences after the Falklands War.

The Phantom entered service with the Fleet Air Arm and the RAF in 1969. In Fleet Air Arm service, it was primarily intended for fleet air defence, with secondary conventional and nuclear strike roles; in the RAF it was soon replaced in its initial tasks by other aircraft designed specifically for strike, close air support and reconnaissance, and was moved to the air-defence mission. By the mid-1970s, the Phantom had become the UK's principal interceptor; it continued in this role until 1992, when it was withdrawn as part of a series of post–Cold War defence cuts.