As part of his visit to Scotland, David Cameron is due to visit HMS Victorious, a Royal Navy submarine which keeps Trident nuclear missiles continuously at sea.
The Scottish National Party say they would scrap Trident in an independent Scotland.
However, Mr Cameron says it would be 'foolish' to abandon it because of the threat of nuclear attack from North Korea.
More top news
A look ahead at the forecast for the Border region.
ITV Border's John Ballard, author of '10 Greatest Ships of the Royal Navy', provides the context and background of the Battle of Jutland
After her mother was ran over by a car, Peter and Iona Pennington saved the life of 'Twiggy' the fawn, who they've now adopted...