Paris attacks: 'We in Britain face a very similar threat' - Cameron

David Cameron has said Britain faces a very similar threat to France from fanatical extremism.

Speaking ahead of the Paris unity march, he said we can only defeat this threat by "confronting the poisonous narrative of Islamist extremism wherever we find it".

Huge crowds have gathered in Paris after three days attacks in which 17 people were killed.

Dave Cameron, joining some 40 world leaders in Paris, said it was important to demonstrate solidarity with the French people.