Under the <a href="https://en.wikipedia.org/wiki/Brussels_Agreement,_1984" id="mwARg" rel="mw:WikiLink" title="Brussels Agreement, 1984">Brussels Agreement</a> signed between the governments of the United Kingdom and Spain, the former agrees to enter into discussions with Spain over <a href="https://en.wikipedia.org/wiki/Gibraltar" id="mwARk" rel="mw:WikiLink" title="Gibraltar">Gibraltar</a>, including sovereignty.