Brook Green is selected as the site for the Mercers' new school. Other sites in Hampstead and Kensington had also been considered.
Miss Frances Ralph Gray is appointed Head Mistress (1903-1910) and then High Mistress (1910-1927). Frances Gray had been educated at Newnham College, Cambridge and had been a Classical Lecturer at Westfield College, London and Head Mistress at St Katharine's College, Fife.
Work begins on St Paul's Girls' School on Brook Green.
The official opening of St Paul's on 15 April 1904 by HRH Mary (Princess of Wales), accompanied by her husband (and future King) HRH George V. Original school fees were £7 per term.
The first society is formed. The Field Club brings girls on botanical expeditions.
Gerard Horsley is selected as the architect for the Mercers' Company's new girls' school.
Miss Elizabeth Diggory is appointed High Mistress.
Mr Mark Weinburg, a St Paul's parent, gives the school its first computer. It was described as a 'small microcomputer which goes easily on a desk top'.
The school hosts a Gala Evening in Aldwych to fundraise for Mrs Brigstocke's ambitious building plans, which includes a new theatre, a computer centre, and an engineering workshop. The evening involves entertainment from Jeremy Irons, John Dankworth, Cleo Laine, and Richard Briers.
HM The Queen Mother returns to St Paul's to open the Celia Johnson Theatre. The audience watches two student performances : a play about Gustav Holst by John Mortimer and a staged production of Purcell's 'Dido and Aeneas'.