The thesis, published as British Incomes and Property, became a standard work on the subject and established his academic reputation.

In 1926 he became Chairman of the LMS and was instrumental in getting William Stanier appointed in 1932 as Chief Mechanical Engineer to resolve the locomotive problems of the company.

In 1935, he was a founding member of the Anglo-German Fellowship[3] and had made low key visits to Nuremberg in 1936 (when he met Adolf Hitler – whom Stamp noted was a "statesman and demagogue combined" – and Franz von Papen), and 1937, to view the Nazi Party Congress with the unspoken support of the then Foreign Secretary Lord Halifax.

[8] Stamp was widely regarded as the leading British expert on taxation, and took an active part in the work of the Royal Statistical Society, serving as president from 1930 to 1932.

[9] Stamp refused to be moved out of his house, 'Tantallon', in Park Hill Road, Shortlands, during the German bombing of The Blitz.

Stamp met his future wife, Olive Jessie Marsh, a soprano and student teacher, when he was seventeen.

Stamp's son Wilfred was killed at the same time and in the same place as his father, but English law has a legal fiction that in the event of the order of deaths being indeterminable, the elder is deemed to have died first.