Westminster Abbey politicians, doctors and scientists such as Isaac Newton, buried on 4 April 1727, Charles Darwin, buried on 26 April 1882, and Stephen Hawking, buried on 15 June 2018. Another was William Wilberforce who led the movement to abolish slavery in the United Kingdom and the Plantations, buried on 3 August 1833. Wilberforce was buried in the north transept, close to his friend, the former Prime Minister, William Pitt. During the early 20th century it became increasingly common to bury cremated remains rather than coffins in the abbey. In 1905 the actor Sir Henry Irving was cremated and his ashes buried
Westminster Abbey in Westminster Abbey, thereby becoming the first person ever to be cremated prior to interment at the abbey. The majority of interments at the Abbey are of cremated remains, but some burials still take place – Frances Challen, wife of Sebastian Charles, Canon of Westminster, was buried alongside her husband in the south choir aisle in 2014. Members of the Percy family have a family vault, The Northumberland Vault, in St Nicholas's chapel within the abbey. In the floor, just inside the great west door, in the centre of the nave, is the tomb of The Unknown Warrior, an unidentified