Brigadier-General Sir Harold Brewer Hartley was a British physical chemist. He moved from academia to important positions in business and industry, including serving as Chairman of the British Overseas Airways Corporation.

Harold Thomas Hartley was a British journalist, publisher, mineral water manufacturer, and professional organiser of exhibitions. He was closely associated with Joseph Lyons and the early development of the J. Lyons & Co. catering company. He was also a noted art collector and bibliophile.