Thank you very much for the infos and pictures. " Jack Macklam was West Yorkshire Road Race Champion in 1959 and 1963, Yorkshire Best All Rounder in 1961 and Tour of Britain rider in the sixties" I found on the blog of Leeds St. Christophers CC.
Thanjs, I‘ve seen it too. In the text they wrote:
Bernard Macklam having joined because of his skills in building rear triangles
So,perhaps the boy with the welder's goggles is Bernard Macklam