Its "houses", commemorating famous former residents of Harrow and one historical building, were Byron, Becket, Shaftesbury and Manor.

The block containing Maths classrooms and facilities for the 6th Form (completed in 2009) is named after former headteacher Howard Freed.

The houses are now Bannister (orange), Nightingale (blue), Franklin (green), King (red), Shabazz (purple), and Gandhi (yellow).

The left hand side of the school's crest is based on the medieval coat of arms of Middlesex, a county of England now absorbed into London.

It shows three Anglo-Saxon short notched swords or seaxes (the names 'seax' and 'Saxon' may be related).