Editing Hawker Siddeley Nimrod (section)

===MRA4===
{{Main|BAE Systems Nimrod MRA4}}
The Nimrod MRA4 was intended to replace the capability provided by the MR2. It was essentially a new aircraft, with current-generation [[Rolls-Royce BR700|Rolls-Royce BR710]] turbofan engines, a new larger wing, and fully refurbished fuselage. The project was subject to delays, cost over-runs, and contract re-negotiations. The type had been originally intended to enter service in 2003 but was cancelled in 2010 as a result of the [[Strategic Defence and Security Review 2010|Strategic Defence and Security Review]], at which point it was £789&nbsp;million over-budget;<ref name=FT/> the development airframes were also scrapped.<ref>[https://www.bbc.co.uk/news/uk-england-12294766 "Scrapping RAF Nimrods 'perverse' say military chiefs."] ''BBC News,'' 27 January 2011.</ref> Some functions were allocated to other assets, with [[Lockheed C-130 Hercules|Hercules]] transport aircraft and E-3 Sentry Airborne Early Warning aircraft given some tasks, but the cancellation of the MRA4 resulted in a significant gap in long-range maritime patrol and search-and rescue capability.<ref>Hoyle, Craig. [https://www.flightglobal.com/news/articles/in-focus-uk-left-exposed-by-nimrod-cancellation-re-376998/ "IN FOCUS: UK left exposed by Nimrod cancellation, report says"]. ''Flightglobal'', 27 September 2012. Retrieved 21 May 2016.</ref><ref>{{cite web |url=https://publications.parliament.uk/pa/cm201213/cmselect/cmdfence/110/110.pdf |title=Future Maritime Surveillance |date=19 September 2012 |publisher=House of Commons Defence Select Committee |access-date=2020-05-28 }}.</ref>

In July 2016, the [[Ministry of Defence (United Kingdom)|Ministry of Defence]] announced the purchase of nine [[Boeing]] [[P-8 Poseidon|P-8A Poseidon]] aircraft for the RAF. The RAF declared the P-8 had reached [[initial operating capability]] (IOC) on 1 April 2020, by which time two of the planes had been delivered.<ref name=RAFIOC>{{cite web |title= RAF Declare Poseidon an Initial Operating Capability |url= https://www.raf.mod.uk/news/articles/raf-declare-poseidon-an-initial-operating-capability/ |date= 3 April 2020 |website= raf.mod |access-date=24 May 2020}}</ref> The nine aircraft will be based at [[RAF Lossiemouth]].<ref>{{Cite web |url=http://www.raf.mod.uk/news/archive/mod-seals-the-deal-on-nine-new-maritime-patrol-aircraft-to-keep-uk-safe-11072016 |title=MOD seals the deal on nine new Maritime Patrol Aircraft to keep UK safe |access-date=9 February 2017 |archive-url=https://web.archive.org/web/20170211075431/http://www.raf.mod.uk/news/archive/mod-seals-the-deal-on-nine-new-maritime-patrol-aircraft-to-keep-uk-safe-11072016 |archive-date=11 February 2017 |url-status=dead }}</ref>