Tibbers Castle led to a succession crisis resulting in English rule of Scotland under Edward I. Robert the Bruce's family was one of the claimants and in 1306 he was crowned king, leading to war with England. The first phase of Bruce's campaign in 1306 was to capture the English-held castles of Ayr, Dalswinton, Inverkip and Tibbers. Control was given to John de Seton until the English recaptured the castle from the Scots, hanging the defenders, and a larger garrison, this time numbering 54, was installed. In 1313 the Scots regained control of the region. From there Tibbers Castle remained in Scottish
Pound Scots shillings 4 pence (two-thirds of a pound Scots). When James VI became King James I of England in 1603, the coinage was reformed to closely match that of England, with 12 pounds Scots equal to the pound sterling. No gold coinage was issued from 1638 to 1700, but new silver coinage was issued from 1664 to 1707. In 1707, the pound Scots was replaced by the pound sterling at a rate of 12 to 1 (1 pound Scots equal to 1s 8d sterling), although the pound Scots continued to be used in Scotland as a unit of account for most