Isil 'aims to attack UK next', claims report as intelligence agencies 'fear fallout from air strikes on Syria'
UK Defence secretary Michael Fallon says UK air strikes in Syria could last three years as RAF focus bomb attacks on Isil's oil fields
There are unconfirmed reports that Isil has decided that the next target of an attack will be Britain.
European security agencies, citing specific intelligence that had been obtained, stated that British Isil operatives in Syria and Iraq were being tasked to return home to launch an attack, CNN reported.
Intelligence suggests ISIS is aiming to hit UK next, has tasked Brit ISIS operatives to return to launch attack, senior official tells CNN.— Paul Cruickshank (@CruickshankPaul) December 3, 2015
The concerns from intelligence agencies had apparently been compounded by the UK parliamentary vote on Wednesday evening.
Meanwhile, British warplanes will once again be in the skies over Syria as the fallout continued from Parliament's decision to back air strikes.
Labour's leadership was forced to appeal for calm following a series of abusive messages aimed at MPs who backed military action, while police were investigating threats aimed at politicians who supported the bombing.
In an email to members urging unity following the vote on military action which split the party, Labour leader Jeremy Corbyn and his deputy Tom Watson insisted that "abuse and intimidation" would not be tolerated.
Mr Corbyn opposed air strikes while Mr Watson backed the action against Islamic State (IS) after the leader allowed his party a free vote on the issue after being unable to agree on a common position.
The two men wrote that the issue "has inevitably led to a big debate", adding: "Labour MPs voted by a clear majority against the air strikes in the end. But we agreed a free vote because of the sincerely-held differing views in the Parliamentary Labour Party."
In response to the hostility faced by MPs, they said: "Politics must be conducted in a better way - more civil and more respectful.
"We all support and defend the democratic right to protest and lobby. And all MPs must be open to hearing the views of their constituents and others on matters of public importance.
"But, as we have both said many times, abuse and intimidation have no place in politics. And the party as a whole will not accept such behaviour, from whatever quarter it comes."