October 6, 2013 - An SAS sniper, lying on a bridge, points his long-range rifle towards a dual-carriageway and peers into his telescopic sight, as if poised to open fire. It makes for a startling image – all the more so since the picture was taken not in a conflict zone or even a training camp but in a public area in the Welsh countryside.
What makes it more arresting is that the photograph was found on a computer belonging to the Special Forces marksman known as Soldier N, who is said to have told his wife that members of the SAS ‘arranged’ the death of Princess Diana.
The Mail on Sunday can reveal that it has now been passed to the Metropolitan Police, whose specialist crime and operations command is investigating the sensational, if improbable, assassination theory.
The allegation first came to light during the second court martial of Sergeant Danny Nightingale, who was found guilty of illegally possessing a gun and ammunition.
Since then it has attracted global press attention and fuelled conspiracy theories.
It was outlined in a letter, written by the mother-in-law of Soldier N, who was a key witness for the prosecution.
The picture was one of 90 images of Special Forces soldiers found on Soldier N’s home computer.
He faces a Ministry of Defence investigation after he was also said to have illegally stored secret SAS tactical documents, videos of operations in Afghanistan and emails to his then wife from Afghanistan identifying the location of SAS and Special Boat Service units, times and dates of operations, and tactics used to kill and capture insurgents.
In all likelihood the men in the photograph taken on the bridge were engaged in a counter-terrorism training exercise, practising a procedure known as high speed vehicle interdiction. The tactic was developed to stop vehicles being driven by terrorists or suicide bombers travelling at speed.