French visitors to the United Kingdom have been urged to employ “extreme vigilance” amid growing fears of a terrorist attack in the country.
Offering new travel advice to its citizens, the French government warned an attack on British public transport was now “highly likely”.
The latest developments follow news a UK terror suspect killed in Pakistan was being groomed to lead a new group in raids on the UK, France and Germany.
The new advice on the French defence ministry website said: “The British authorities consider the terror threat level is very high in the United Kingdom and the risk of an attack is highly likely.”
The United States also believes a cell of Germans and Britons are at the heart of a terror plot against European cities, a plan they link to al-Qaida leader Osama bin Laden.
Germany, meanwhile, says it remains watchful but that there is no reason to be “alarmist”.