The most northerly castle in Britain built for Robert the Bruce's brother is set to go up for auction - with bids starting at £149,000.
Muness Castle on the Isle of Unst was built in the 15th century for Laurence the Bruce, the half-brother of the King of Scots.
It is the most northerly castle in Britain, on an island believed to have inspired Robert Louis Stevenson's novel 'Treasure Island'.