Henry de Percy, 1st Baron Percy the commissioning of Warwolf, a giant trebuchet which flattened the curtain walls. The defenders had tried to surrender four days earlier, but had been made to wait by the king while he tried out his new toy. In September 1305 the first joint English and Scottish parliament met at Westminster to agree a constitution for the unified state, with Percy playing a leading role in the negotiations, but Robert Bruce, a leading representative of the Scots, was already conspiring to rebel. On 25 March 1306 Robert Bruce was crowned King of Scotland at Scone Abbey, upon which Edward confiscated his
William de Lamberton make a move for Kingship they would not try to stop him. Bruce murdered the Red Comyn in the Greyfriars Church on 10 February 1306. Less than seven weeks later Bruce was crowned King of Scotland in Scone Abbey on 25 March 1306. Lamberton and Wishart jointly conducted the coronation. Bruce was crowned again a few days later by Isabella MacDuff. Lamberton and Wishart were arrested and put in irons for their roles in Bruce's coronation and transported to London where they were imprisoned. "Only their Orders saved them from hanging." Lamberton was later charged with treason against Edward. After