It all happens at Lea Mills near Matlock in Derbyshire, founded in 1784 by Peter Nightingale — a relation of Florence Nightingale — and John Smedley. The mill began in muslin and cotton, moved into knitting and hosiery, and is said to have given the world the Long John. Because Lea Mills still operates today, John Smedley claims to be the world's longest-running factory manufacturer.
The brand is named for the better-known John Smedley (1803–1874), who took over the mill in 1825 and built it into a maker of finished garments rather than just cloth. The company now sells in over 30 countries, with Japan its largest export market and UK concessions in Flannels and Fenwick.