Hill House International Junior School is an independent preparatory day school primarily in the Knightsbridge district of London. It was founded in September 1949 by athlete and Liberal Party politician Lt-Col Stuart Townend with his wife, Beatrice, initially in Switzerland, but has since also established branches in South West London. It is the largest preparatory school in London and was originally a boys-exclusive school, turning fully coeducational in 1981. The school is known for its distinct uniform, which includes thick mustard cable-knit jumpers, rust corduroy knickerbockers, knitted hats, and bags in British racing green.