Alfred Robens, Baron Robens of Woldingham Signed 1975 letter
Wiki "Alfred Robens, Baron Robens of Woldingham, PC (18 December 1910 - 27 June 1999), sometimes known as Alf Robens, was an English trade unionist, Labour politician and industrialist. His political ambitions, including an aspiration to become Prime Minister, were frustrated by bad timing; but his energies were diverted into industry: he spent a decade as chair of the National Coal Board, and later headed a major inquiry which resulted in the Robens Report on health, safety and welfare at work. His outlook was paternalistic, but in later life, he moved away from his early socialism towards the Conservative Party. His reputation remains tarnished by his failure to have foreseen and prevented the Aberfan disaster, followed by actions widely regarded as insensitive during this disaster's aftermath."
( Alfred Robens, Baron Robens of Woldingham Autograph Signature)