Yes, that's an interesting subject which brings back memories of the grocery department in Co-op branch no. 101 on Hawthorn road. And thank you Jennyann for the very informative link. I think the grocery dept on the ground floor (or was it the basement?) of Lewis's also had a Lamson installation before the war. Other departments had the popular pneumaic tube. Barbara's first job after we married in 1960 was as a bill clerk in the Piccadilly Hotel, London, where she had to tot up the bills from the different bars, restaurants and of course the reception desk, which handled the rooms and room service. She never touched the money, which was handled by cashiers.
Peter