Chris Young quoted Do Not Pass Go by Tim Moore
To keep control of the stupendous throughput of staff, customers and buttered scones, the firm was one of the first in Britain to acquire a computer: unable, in 1949, to find any such machine to buy, the Lyons R&D boys sat down and built one themselves, based on a pioneering Cambridge mainframe.
— Do Not Pass Go by Tim Moore (Page 213)
Lyons, famous for the Corner Houses, built their own computer in 1949!