It can now be announced that the King has an engagement in the far north of Scotland today.
Charles will visit a nuclear transport ship and unveil a plaque to mark the 70th anniversary of a decommissioned nuclear site where engineers experimented with plutonium and uranium to generate electricity in the 1950s.
The monarch will attend an event hosted by the Nuclear Decommissioning Authority in Scrabster, Caithness later today.
He will attend a reception at Scrabster Harbour to mark the 70th anniversary of the Dounreay nuclear site, the 50th anniversary of the Pacific Nuclear Transport Limited (PNTL), and the 20th anniversary of the Nuclear Decommissioning Authority.
It comes after Charles was spotted at church on the Sandringham estate yesterday.
© Anadolu via Getty ImagesKing Charles will be in Scotland today