SAS soldiers and MI6 spies are supporting the French Counter Terrorist team who fear that a ‘sleeper cell’ from the UK may already have entered France to launch an attack
There are also 350 British paratroopers standing by, ready to deploy in the event of a terror attack during Euro 2016
According to sources quoted by the Express newspaper on Sunday, there are three SAS captains and a major, as well as MI6 operatives, working with French security forces to monitor the situation.
Personnel from the Joint Terrorist Analysis Cell and GCHQ are also said to be working with the group.
An anonymous security source told the paper: “Our people are part of a liaison team to provide advice and tactical guidance as well as resources if required.
“The problem is the number of hardline Islamic community in the UK has grown and we simply cannot monitor them all,” the source added.
The news comes as the Ministry of Defence (MoD) announced up to 350 paratroopers are on standby to intervene in France in the event of a terror incident.
The troops have been taking part in a mass NATO exercise. A source reported they were stationed with US and other troops.
The Express says the contingency force includes up to 2,000 troops and 35 helicopters are ready to deploy if events take a turn for the worse during the tournament.
In April, it was reported that British Special Forces are training on board an Osprey heliplane, in order to respond rapidly to terror attacks on UK soil.