From September 1923 until 1925, Roald attends the local Llandaff Cathedral School, an all-boys Preparatory School.
During his time at Llandaff, Roald and his friends stage “the great and daring Mouse Plot" - involving a local sweet shop, its miserable and dirty owner Mrs Pratchett, and a dead mouse. Roald tells the story in detail in his 1984 memoir Boy.
Picture shows Roald with his sisters Else and Alfhild around 1923.