Based at Potterne, near Devizes, the school was established in 1958 and is set in 4 acres of grounds, amidst beautiful countryside.
Largely contained in an eighteenth century water mill, traceable to the Domesday Book, The Mill School is a co-educational independent preparatory day school for children aged 2-11 years. The school has seven separate forms, one for each school year, with a maximum of sixteen pupils per form and a purpose-built nursery.