William Grindecobbe motivated at least in part to rebel as a result of the pressures of papal taxation. Along with Wat Tyler and John Wrawe, he was one of the key leaders of the peasants during the revolt of 1381, leading the townspeople of St Alban's on 15 June. He was executed in 1381 along with John Wrawe and John Ball. His trial and execution was overseen by Henry le Despenser. During the Peasants' Revolt of 1381, he became well known for his actions against the high lord Thomas de la Mare, Abbot of St. Albans. He led a deputation to King
Economics of English towns and trade in the Middle Ages system of poll taxes, aiming to spread the costs of taxation across the entire of English society. One result of the economic and political tensions was the Peasants' Revolt of 1381 in which widespread rural discontent was followed by invasion of London involving thousands of rebels. The rebels had many demands, including the effective end of the feudal institution of serfdom and a cap on the levels of rural rents. The ensuing violence took the political classes by surprise and the revolt was not fully put down until the autumn, with up to 7,000 rebels being executed in the aftermath.