Dunblane secret documents contain letters by Tory and Labour ministers Investigation: By Neil Mackay, Home Affairs Editor LETTERS between Labour and Tory ministers and correspondence relating to Thomas Hamilton's alleged involvement with Freemasonry are part of a batch of more than 100 documents about the Dunblane mass murder which have been sealed from public sight for 100 years.The documents include a letter connected to Hamilton, which was sent by George Robertson, currently head of Nato, to Michael Forsyth, who was then Secretary of State for Scotland.Until now it was thought that a 100-year public secrecy order had only been placed...