Decision to return Treaty ports to Free State in 1938 proved ‘completely wrong’
Lemass on the Treaty ports: Britain handed back ports under mistaken belief radar alone could detect German submarines
Undated photograph of Éamon de Valera (right) meeting Winston Churchill. Photograph: Royal Irish Academy/PA Wire
Britain handed back the Treaty ports in 1938 based on a false belief that their technological advances would stop German submarines, Seán Lemass believed.