Henry was the last survivor of the 23 founders of the Market Research Society, which he helped establish in 1947. Later, as the marketing director of the Thomson Organisation, he played a key role in getting newspapers and magazines to shed their old-fashioned ways and embrace marketing.
His most famous promotion was for the newly launched Sunday Times colour magazine, which was slow to build ad revenue.
Henry joined Colman Prentice & Varley as a market research specialist in 1937. From 1947 to 1953, he was responsible for the Hulton Readership Surveys (the precursor of the National Readership Surveys).
In 2004, the Advertising Association awarded him its prestigious Mackintosh Medal for outstanding service to the industry.