Arthur Metcalfe, a top British rider in the 1960s, won the Milk Race in 1964 and, in the same year, had back-to-back stage wins in Canada's classic Tour du St. Laurent. Two years later he won both the National Road Race championships and the Best All-Rounder competition in the time trial. In 1967 and 1968 he raced in the Tour de France, once winner the combativity prize after one of his signature long, solo breakaways.
In 1972, after retiring from racing, he founded a frame building business with another road star of the day, Wesley Mason. Metcalfe and Mason- the two M's in MKM- produced their frames from Chapel Works in Harrogate, so named because it was a former chapel. The building was owned by Ron Kitching, the 'K' in MKM. The business operated until the late 1970s.
Metcalfe remained a roadie and was often to be seen on his bike in the Yorkshire countryside he loved. Arthur Metcalfe died of cancer in 2002 at his home in Harrogate.