He was considered the head of intelligence of the IRA for a period from the mid-1990s – being named as such under parliamentary privilege.
More recently, he was the northern chairman of Sinn Féin.
He spent more than 20 years in jail, beginning with internment without trial when he was 17, a year after he joined the IRA in 1972.
Security sources linked him to several major incidents, including the Northern Bank robbery.
Irish State papers now reveal the UK government “were given to believe” the raid had been organised by Mr Storey and was too complex to have been solely “a brigade job”.
Sinn Féin has not responded to requests for comment.