In England, the Great Revolt against Henry's rule involved a coalition of rebel barons, bolstered by support from the King of Scots and European allies. King William the Lion pushed south from Scotland in 1173 and Bowes Castle was damaged in the raids; work was carried out in anticipation of further attacks the following year, including repairs to the chamber, gates and the construction of bulwarks around the keep. The next year William, King of Scots directly besieged the castle, but was he forced to retreat after the arrival of a relief force led by Henry's illegitimate son Geoffrey, then the Bishop of Lincoln.