Following the acquisition of a building in Cadogan Gardens in 1977, the "Kensington Court Lower School" came into being with two teachers and 11 pupils.
The school, which became Thomas's, Battersea, moved to its extensive new premises in October 1990 and the leasehold buildings in Cadogan Gardens were sold.
In September 1995, David and Joanna Thomas's two sons, Tobyn and Ben, were appointed Principals, having worked in the schools for a number of years.
The aims of the charity, Thomas's Schools Foundation, are to assist certain parents financially with the education of their children and to run local community projects.
In 1999, David and Joanna Thomas retired from active management of the schools, which are now run by Tobyn and Ben.
Lady Eden's was closed in Summer 2002 and its buildings converted to become the Lower School of Thomas's, Kensington.
In 2004, Thomas's acquired a long lease on the buildings formerly owned by the London Institute for the Chelsea College of Art and Design in Hugon Road, Fulham.
A £1.3m refurbishment programme by the landlords commenced in January 2005 and Thomas's, Fulham opened in September 2005 as a co-educational preparatory school for children from 4 to 11 years old.
The school employs a team of chefs who prepare a diverse menu of vegan, vegetarian, fish, gluten-free and dairy options.
[15][16] Maud Windsor, Prince George's third cousin once removed, also began attending Thomas's Battersea on the same day.
[20][21] In October 2017, Islamic State supporter Husnain Rashid posted a photograph of Prince George along with his school's address, a silhouette of a jihad fighter and the message: "Even the royal family will not be left alone" in a Telegram chat group.