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.
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Kerrie brings Saturday's pollen count for the Border region
Kerrie brings you Saturday's forecast
Sunshine & showers over the next few days, rain by night. Feeling cool & unseasonably windy for the first few days of June