The plaque outside of Alliance Francaise in London

Apparently this building, near Baker street in London (to which the plaque is affixed - it's at Dorset Square) was used as an office for the SOE and in particular RF section (created sometime after F section and dedicated to supporting de Gaulle's Free French). Now it houses the Alliance Francaise in London. I am told my aunt worked in the building as a secretary in SOE.