The Darker the Night by Martin Patience

A referendum on Scottish independence is only days away, and the campaign has been expertly orchestrated by First Minister Susan Ward. All signs point to victory for the nationalists. But when senior civil servant John Millar is shot in a Glasgow alley on a furiously rain-soaked night, his death triggers a chain of catastrophic events. An incriminating phone number and video are found in his possession.
Into this chaos walks reporter Fulton Mackenzie. A man himself blighted by tragedy but also someone used to seeing beneath the surface to find the truth. Who was John Millar? Who wanted him dead? And why? And the biggest question of all – who is trying to alter the future path of an entire nation?