Brimstone is a ground or air-launched ground attack missile developed by MBDA UK for the UK's Royal Air Force. It was originally intended for "fire-and-forget" use against mass formations of enemy armour, using a millimetre wave (mmW) active radar homing seeker to ensure accuracy even against moving targets. Experience in Afghanistan led to the addition of laser guidance in the dual-mode Brimstone missile, allowing a "spotter" to pick out specific and the highest priority targets, particularly useful to minimise collateral damage when friendly forces or civilians were in the area. The tandem shaped-charge warhead is much more effective against modern tanks than older similar weapons such as the AGM-65G Maverick missile. Three Brimstones are carried on a launcher that occupies a single weapon station, allowing a single aircraft to carry many missiles.

Operation Ellamy was the codename for the United Kingdom participation in the 2011 military intervention in Libya. The operation was part of an international coalition aimed at enforcing a Libyan no-fly zone in accordance with the United Nations Security Council Resolution 1973 which stipulated that "all necessary measures" shall be taken to protect civilians. The coalition operation was designated by NATO as Operation Unified Protector, by the US as Operation Odyssey Dawn. The Canadian participation as Operation Mobile and the French participation as Opération Harmattan. It was confirmed in December 2011 that the cost of the operations was £212m – less than was estimated, including £67m for replacing spent munitions, is all expected to be met from the Treasury reserve.