However, the results for each county as a whole are not always directly related to the number of grammar schools, as Kent and Medway perform under average at A-level. The King's School, Canterbury claims to be oldest in England - 597AD. Herschel Grammar School in Slough is the most oversubscribed school in England - 14 people per place, Langley Grammar School in Slough is next with 13 per place, then Burnham Grammar School.[35]