Britain does not possess the forces to act militarily against Isil
David Cameron’s promise to "use everything we have in our armoury"
in the fight against terrorism carries little weight
Two US F-15C's (L and R) and a Canadian F-18 (C) take part in a flypast over the Nato 2014 Summit at the Celtic Manor Resort in Newport, South WalesPhoto: CARL COURT/AFP/Getty Images