Unite said 300 of its members at Devonport, Portsmouth, Faslane, Great Harbour Greenock and Kyle of Lochalsh will take industrial action in March.

Torben Hersborg pleaded guilty to spying on female university students in December last year, the court was previously told.

The family of Lisa Dorrian have described enduring a “lifetime of pain” on the 20th anniversary of her disappearance and murder.

Judge Everett said it would be wrong to sentence Amesbury differently because he was an MP but added: “That doesn’t mean we can’t take into account that your behaviour as an ...