Egham is a town in the Borough of Runnymede in Surrey, England, approximately 19 miles west of central London. First settled in the Bronze Age, the town was under the control of Chertsey Abbey for much of the Middle Ages. In 1215, Magna Carta was sealed by King John at Runnymede, to the north of Egham, having been chosen for its proximity to the King's residence at Windsor.