A former deputy leader of the Scottish National Party has called on the spooks to stay out of the debate on Scotland’s constitutional future.
Margo MacDonald, now an independent MSP, has argued that she believes MI5 agents are already operating undercover within the SNP as part of the security service’s remit to protect the UK “against threats to national security”.
In 2007 Scotland on Sunday revealed that classified government documents showed that secret service and special branch agents and officers infiltrated the SNP in the 1950s in an attempt to undermine efforts and support for independence.
Many nationalists believe the same occurred in the 1970s when Scotland’s oil boom raised fears in the heart of Whitehall that it could revive calls and support for independence.