Thomas Jones, CH (27 September 1870 – 15 October 1955) was a British civil servant and educationalist, once described as "one of the six most important men in Europe", and also as "the King of Wales" and "keeper of a thousand secrets".

In 1890 he won the Calvinist Methodist scripture gold medal and proceeded to the University College of Wales at Aberystwyth to study for the ministry.

[7] There were three children from the marriage: Eirene White (1909–99), who became a Labour Minister under Harold Wilson (1966–70), Tristan (1913–90), who became managing director of The Observer, and Elphin, who died in a motoring accident in 1928.

[10] He became familiarly known as "T.J." He was Deputy Secretary to the Cabinet under four Prime Ministers: David Lloyd George, Bonar Law, Stanley Baldwin and Ramsay MacDonald.

When Baldwin became Prime Minister in 1923, he decided to retain Jones as Deputy Secretary, telling him on the day he was appointed Premier: "I shall want you to hold my hand, Tom".

You supply the radium...you have such an extraordinary width of friendships in all classes, and so many interests that through you I do gather impressions of what is being thought by a number of significant people whose minds I should not know, at any rate so well, but for your help.

His biographer, Dr E. L. Ellis, claimed that Jones was invaluable to Lloyd George in dealing with the trade unions and the Irish Question, along with dissuading Baldwin from taking revenge in the aftermath of the General Strike.

[19] The military historian Correlli Barnett in his history of Britain's international relations in the interwar period, called Jones "a man of simplicity and naivete remarkable in politics even for that age".