“In a statement from Downing Street, the prime minister expressed solidarity with France and warned that ‘however much we prepare, we in the UK face the same threat’. After a meeting of the emergency Cobra committee, Cameron said the terror threat level for the UK would remain at severe but it would be further reviewed in the light of evolving risks from groups and individuals associated with Islamic State. There will also be extra security at airports, especially those with routes with France. However, there is said to be no specific intelligence of a direct terrorist threat to attack Britain. There will be extra security at events where large crowds gather, at least in the short term.”
http://www.theguardian.com/uk-news/2015/nov/14/paris-attacks-david-cameron-emergency-cobra-meeting