He added: “So real concern now about the threat to the United Kingdom.
”Concern in Europe, particularly in the UK now that what we saw in Paris, an attack like that, could play out again, perhaps in the United Kingdom, in the weeks ahead.”
CNN’s terror analyst Paul Cruickshank said he had received intelligence from a senior insider
“There’s always going to be a fear and a risk that this radicalisation we are seeing is happening within the UK.
“We know that 750 to 1,000 British Muslims have gone to fight with ISIS and that most of them have come back.
“The reality is that there is a high terror alert and there is a threat it’s something that could happen in the UK.”