The War Cabinet discussions of the 1982 conflict have been released:

 

http://nationalarchives.gov.uk/news/cab-highlights-1982.htm

 

As consequence, reflections about the situation on 1982 about Gibraltar and Spain as commented by Thatcher and his government in an article in The Guardian:

http://www.guardian.co.uk/world/2012/dec/28/margaret-thatcher-gibraltar-falklands-war

... and ricocheted in the Spanish digital and paper media 20 Minutos:

http://www.20minutos.es/noticia/1689084/0/thatcher-espana/miedo-ataque/gibraltar-malvinas/

Had a skim through the stuff. Most of its political, but there is a discussion on attacking 25 de Mayo in there. A lot of the military stuff has probably been retained; as there are still T42s and Harriers in service in the UK or allied nations.