John Berkeley (1352–1428) John Berkeley (1352–1428) Sir John Berkeley (1352–1428), of Beverston Castle, Gloucestershire was an English politician. He was the son of Thomas de Berkeley, 3rd Baron Berkeley of Berkeley Castle and Katherine Clivedon. He was knighted before 1383. He was appointed High Sheriff of Somerset and Dorset for 1390–91 and 1394–95, High Sheriff of Gloucestershire for 1392–93, 1397–98 and 1414–15, High Sheriff of Hampshire for 1402–03 and 1406–07, and High Sheriff of Wiltshire for 1410–11. He was a Member (MP) of the Parliament of England for Gloucestershire in February 1388, September 1388 and January 1397, for Somerset in November 1390 and
England in the Late Middle Ages English heir in her power, Isabella refused to return to England unless Edward II dismissed his favourites and also formed a relationship with Roger Mortimer, 1st Earl of March. The couple invaded England and, joined by Henry, 3rd Earl of Lancaster, captured the king. Edward II abdicated on the condition that his son would inherit the throne rather than Mortimer. He is generally believed to have been murdered at Berkeley Castle by having a red-hot poker thrust into his bowels. In 1330 a coup by Edward III ended four years of control by Isabella and Mortimer. Mortimer was executed, but