This morning' s COBRA meeting, chaired by Mr Cameron, was attended by Home Secretary Theresa May, Defence Secretary Philip Hammond, Mayor Boris Johnson, Met Commissioner Sir Bernard Hogan-Howe, and Assistant Commissioner Cressida Dick.
The Minister for Faith and Communities Baroness Warsi, Communities Secretary Eric Pickles and the British intelligence agencies.
More top news
A sigh of relief across Westminster and a crushing sense of disappointment for 45% of Scotland, but Yes campaign could not have done more.
ITV Border Political Editor Peter MacMahon says we've just seen a emotional former SNP MSP appearing to concede that the Yes side has lost.
ITV Border Political Editor Peter MacMahon says it's far too early to call this referendum.