In January 1380, Sudbury became Lord Chancellor of England, and the insurgent peasants regarded him as one of the principal authors of their woes. Having released John Ball from his prison at Maidstone, the Kentish insurgents attacked and damaged the archbishop's property at Canterbury and Lambeth; then, rushing into the Tower of London, they seized the archbishop himself. So unpopular was Sudbury with the rebellious peasants that guards simply allowed the rebels through the gates, the reason being his role in introducing the third poll tax.