The <a href="https://en.wikipedia.org/wiki/Hawker_Siddeley_Harrier" id="mwASo" rel="mw:WikiLink" title="Hawker Siddeley Harrier">Hawker Siddeley Harrier</a>, the first operational <a href="https://en.wikipedia.org/wiki/Fighter_aircraft" id="mwASs" rel="mw:WikiLink" title="Fighter aircraft">fighter aircraft</a> with <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Vertical/Short_Takeoff_and_Landing" id="mwASw" rel="mw:WikiLink" title="Vertical/Short Takeoff and Landing">Vertical/Short Takeoff and Landing</a> capabilities, enters service with the <a href="https://en.wikipedia.org/wiki/Royal_Air_Force" id="mwAS0" rel="mw:WikiLink" title="Royal Air Force">Royal Air Force</a>.<sup about="#mwt190" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-34"}}' id="cite_ref-34" rel="dc:references" typeof="mw:Extension/ref"><a href="./April_1#cite_note-34" id="mwAS4" style="counter-reset: mw-Ref 34;"><span class="mw-reflink-text" id="mwAS8">[34]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-34"><cite about="#mwt187" class="citation web cs1" id="mwCMc"><a class="external text" href="https://web.archive.org/web/20230317171910/https://www.tangmere-museum.org.uk/aircraft-month/hawker-siddeley-harrier" id="mwCMg" rel="mw:ExtLink nofollow">"Hawker Siddeley Harrier"</a>. <i id="mwCMk">Tangmere Military Aviation Museum</i>. April 2008. Archived from <a class="external text" href="https://www.tangmere-museum.org.uk/aircraft-month/hawker-siddeley-harrier" id="mwCMo" rel="mw:ExtLink nofollow">the original</a> on 17 March 2023<span class="reference-accessdate" id="mwCMs">. Retrieved <span class="nowrap" id="mwCMw">17 March</span> 2023</span>.</cite><span about="#mwt187" class="Z3988" id="mwCM0" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=Tangmere+Military+Aviation+Museum&amp;rft.atitle=Hawker+Siddeley+Harrier&amp;rft.date=2008-04&amp;rft_id=https%3A%2F%2Fwww.tangmere-museum.org.uk%2Faircraft-month%2Fhawker-siddeley-harrier&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AApril+1"></span></span>