Former MI-6 Double Agent Warns of Major Terrorist Attack in the UK

Former MI-6 Double Agent Warns of Major Terrorist Attack in the UK

Hugh Fitzgerald

Aimen Dean was once a member of al-Qaeda who, after the group’s attacks on American embassies in Kenya and Tanzania, resulting in two hundred deaths and 4,000 wounded, abandoned the group inwardly, but pretended to continue to support it while in fact he had joined MI6, where he spent eight years as a double agent. 

Dean has now warned that a major terrorist attack in the U.K. is inevitable, for there are hundreds of Muslim fanatics in “sleeper cells” ready to strike inside the country. More on this Cassandra-like warning from this former al-Qaeda member turned MI6 double agent can be found here: “Ex-MI6 operative issues dire warning over 9/11 style attack in Britain with hundreds of terrorists hiding in the UK,” by Richard Jeffries, GB News, December 28, 2025:

A former MI6 operative has issued a stark warning that Britain faces the threat of a catastrophic terrorist attack comparable to 9/11 or the 7/7 London.

Aimen Dean, who worked as a double agent within the terrorist organisation for eight years while feeding intelligence to British security services, believes an attack is inevitable.

“It’s not about if another 9/11 or 7/7 attack will happen; it’s about when,” he told the Sun.

The former informant, whose undercover work proved instrumental in thwarting major plots against Western targets, warned the UK harbours “hundreds” of potential Al-Qaida sleeper agents who could be activated to strike at any moment.

Mr Dean argues Islamic extremism and Iranian influence represent the gravest dangers facing the West today.

His journey from terrorist to intelligence asset began in his teenage years, when he joined Al-Qaida and received bomb-making training in the Afghan mountains over an 11-month period.

During his time with the organisation, he worked alongside some of the world’s most dangerous figures, including Abu Khabab, who oversaw the development of Al-Qaida’s mass-casualty weapons programme until a CIA drone strike killed him in 2008.

His intelligence gathering for MI5 and MI6 proved invaluable in disrupting terrorist operations, most notably a planned attack on New York’s underground transport network orchestrated by Khabab.

The information Mr Dean provided to British and American security services is believed to have prevented hundreds, possibly thousands, of deaths during his eight years operating covertly within Al-Qaida’s ranks.

Mr Dean contends that Western governments have misdirected their attention by treating Russia as the principal adversary, when Tehran poses the more pressing danger to British citizens.

He argued Iran has provided sanctuary to Al-Qaida for a quarter of a century, creating conditions that have enabled sleeper cells to mount attacks against British nationals, including deadly assaults on UK citizens in the United Arab Emirates….