He went to the Paris Exhibition of 1867 with an exhibit of his father's firm's machinery. In the same year he started business for himself, founding R A Lister and Company to produce agricultural machinery. The principal products were cream separators and other dairy and sheep shearing machinery, petrol, oil and gas engines, tractors, tractor ploughs and automatic electric lighting plants.
Lister travelled extensively to promote his company's products. He was a pioneer of business in Western Canada by taking the first cream separator in that region over the plains of Alberta. In 1900 he had many interviews with Dominion Ministers including Wilfrid Laurier and was asked to give evidence before the Tariff Revising Committee.
Lister also devoted much time to public work. He served on Gloucestershire County Council from the time of its formation in 1889 until 1928.
Lady Frances Lister died in September 1911 and Sir Ashton was survived by three sons.
References
^London Gazette Issue 28469 published on 24 February 1911. Page 2