Editing Boeing AH-64 Apache (section)

===United Kingdom===
{{main|AgustaWestland Apache}}
[[File:westland apache wah-64d longbow zj206 arp.jpg|thumb|[[Army Air Corps (United Kingdom)|UK Army Air Corps]] Westland WAH-64D Apache Longbow displays at a UK airshow]]

The UK previously operated a modified version of the AH-64D Block I Apache Longbow; initially called the Westland WAH-64 Apache, it is designated the Apache AH1 by the British Army. [[AgustaWestland|Westland]] built 67 WAH-64 Apaches under license from Boeing,<ref>{{cite web |url=http://www.agustawestland.com/node/3232 |title=British Army receives 67th Apache in ceremony held at the Farnborough Airshow 2004 |publisher=AgustaWestland |date=21 July 2004 |url-status=dead |archive-url=https://web.archive.org/web/20110707095747/http://www.agustawestland.com/node/3232 |archive-date=7 July 2011}}</ref> following a competition between the [[Eurocopter Tiger]] and the Apache for the British Army's new Attack Helicopter in 1995.<ref>{{cite news |url=http://www.accessmylibrary.com/coms2/summary_0286-6339513_ITM |archive-url=https://archive.today/20120719050302/http://www.accessmylibrary.com/coms2/summary_0286-6339513_ITM |url-status=dead |archive-date=19 July 2012 |title=High Noon For Tiger And Apache |publisher=Interavia Business & Technology |first=Nick |last=Cook |date=1 May 1995}}</ref><ref>{{cite news |url=http://nl.newsbank.com/nl-search/we/Archives?p_product=SL&p_theme=sl&p_action=search&p_maxdocs=200&p_topdoc=1&p_text_direct-0=0EB0831C4678BE61&p_field_direct-0=document_id&p_perpage=10&p_sort=YMD_date:D&s_trackval=GooglePM |title=Mac Lands $3.5 Billion Copter Order – British Buying 67 Antitank Craft |work=St. Louis Post-Dispatch |first=William |last=Flannery |date=14 July 1995 |access-date=29 January 2010 |archive-date=8 June 2011 |archive-url=https://web.archive.org/web/20110608160850/http://nl.newsbank.com/nl-search/we/Archives?p_product=SL&p_theme=sl&p_action=search&p_maxdocs=200&p_topdoc=1&p_text_direct-0=0EB0831C4678BE61&p_field_direct-0=document_id&p_perpage=10&p_sort=YMD_date:D&s_trackval=GooglePM |url-status=dead }}</ref> Important deviations made by AgustaWestland from the U.S. Apache variants include changing to more powerful [[Rolls-Royce plc|Rolls-Royce]] engines,<ref>{{cite web |url=http://www.turbomeca.com/public/turbomeca_v2/html/en/produits/sous_famille_home.php?sfid=509&mid=615 |title=RTM 322 |publisher=Turbomeca |access-date=29 January 2010 |url-status=dead |archive-url=https://web.archive.org/web/20090803231550/http://www.turbomeca.com/public/turbomeca_v2/html/en/produits/sous_famille_home.php?sfid=509&mid=615 |archive-date=3 August 2009}}</ref> and the addition of a folding blade assembly for use on naval ships.<ref name="seatrials1"/>

On 11 July 2016, the Ministry of Defence confirmed a U.S. [[Foreign Military Sales|Foreign Military Sale]] (FMS) worth $2.3 billion (~${{Format price|{{Inflation|index=US-GDP|value=2300000000|start_year=2016}}}} in {{Inflation/year|US-GDP}}) for 50 AH-64Es to be built in Mesa, Arizona. Leonardo Helicopters in the UK will maintain the current fleet of Apaches until 2023–2024, with a long-term plan for Leonardo and other UK companies to "do most of the work" on the new fleet.<ref>{{cite web |url=http://www.defensenews.com/story/defense/show-daily/farnborough/2016/07/11/uk-announces-p8-apache-buys-farnborough/86935956/ |title=UK Announces P-8, Apache Buys |date=11 July 2016 |publisher=Defense News}}</ref> The deal included an initial support contract for maintenance, spare parts, and training simulators; components from the older WAH-64s "will be reused and incorporated into the new helicopters where possible." The type entered service with the British Army in 2022.<ref>{{cite web |url=https://www.gov.uk/government/news/mod-orders-new-fleet-of-cutting-edge-apache-helicopters-for-army |title=MOD orders new fleet of cutting-edge Apache helicopters for Army |date=11 July 2016 |publisher=UK Ministry of Defence}}</ref> Approval for the re-manufacture of fifty of the UK's WAH-64 Mk 1 fleet to AH-64E Apache Guardian standard was given by the [[Defense Security Cooperation Agency]] in August 2015.<ref>{{cite web |url=http://www.dsca.mil/major-arms-sales/united-kingdom-ah-64e-apache-guardian-attack-helicopters |title=United Kingdom – AH-64E Apache Guardian Attack Helicopters |date=27 August 2015 |publisher=DSCA}}</ref> They utilize the [[General Electric T700]] engine rather than the Turbomeca RTM322 of the WAH-64; the first off-the-shelf purchase of a GE engine by the Ministry of Defence.<ref>{{cite magazine |url=http://aviationweek.com/defense/despite-brexit-uk-not-holding-back-new-aircraft? |title=Despite Brexit, UK Not Holding Back on New Aircraft |date=15 July 2016 |magazine=Aviation Week}}</ref> The first two AH-64Es were delivered to the British Army on 26 November 2020.<ref>{{cite web |title=Apache AH-64E heralds new era in modern British military aviation |url=https://www.army.mod.uk/news-and-events/news/2020/11/new-apache-helicopter/ |website=British Army |access-date=17 February 2021}}</ref> The older AH1 (WAH-64) were retired by 2024 in favour of the AH-64E models.<ref>{{Cite web |date=2024-03-26 |title=British Army retires Apache AH1 attack helicopters, declares AH-64Es 'operationally ready' |url=https://www.janes.com/osint-insights/defence-news/british-army-retires-apache-ah1-attack-helicopters-declares-ah-64es-operationally-ready |access-date=2024-06-17 |website=Default |language=en}}</ref>