The school has around 300 day pupils, ranging from Reception aged four, to Sixth Form pupils aged eighteen.

The school is based in central Royal Leamington Spa, housed in a mixture of Victorian and modern buildings.

Originally a dame school kept by Mrs Worthington at 2 Lillington Place, Leamington Spa, in 1864 the school was taken over by a former Assistant Master at Leamington College, Mr Alfred Kirk.

Originally the oldest prep school in Warwickshire, it extended its admission age to the GCSE years in 2008 and launched a Sixth Form in September 2013.

Arnold Lodge has an assessment process for admission to the school from Year 3 and up with a series of assessment days taking place across the academic year.