The British intelligence service MI5 attempts to recruit an unnamed senior figure in the Groupe Islamique Armé (GIA), an Algerian terrorist organization many of whose operatives are based in London. An Algerian informer called Reda Hassaine helps with the attempted recruitment, and is instructed to befriend the GIA leader, and to find him an apartment in London so he no longer has to sleep in Finsbury Park mosque, a hotbed of extremism. It is unclear whether the recruitment is successful, but Hassaine obtains new information and passes it on to MI5. In August 1999, he finds that three operatives of the Salafist Group for Preaching and Combat (GSPC), another Algerian terrorist organization allied with al-Qaeda, have arrived in London and informs the British authorities of this. [O’Neill and McGrory, 2006, pp. 147]