Tally-Ho!
Note they're also wearing Greenspot Nomad jackets, the preferred cycling jacket of the era (mid-1960s - 1970s).
They came in beige, loden (as seen in the Mechanised Tramp film), a light bottle green, and blue, if I recall correctly.
Very nice, but the Sartor M-65 Alpine jackets (on the left, in the advert, below) just a generation earlier (as seen throughout the 1955 BBC film Cyclists' Special) were even nicer, with a drawstring waist and a full "skirt." Love the way they hang. Look for a plethora of them in the first two minutes of Cyclists' Special and throughout the film. They came in fawn, medium brown, green, rust, navy, etc., but most were fawn or medium brown. Sometimes adorned with the CTC patch sewn on by mum. Just the job! At appx. 2:49 you'll also see a chap going through the railway catering van food line wearing the hip-length Sartor M-45 Hip-length jacket, another popular cycling jacket, as seen on the right-hand side of the advert.

When I mentioned the Sartor jackets on the CR list years ago as being the dominant cycling jacket of the era (pretty much the only mass-marketed one for a good 20+ years), not one British member remembered them. They wrote back as if I had two heads (which perhaps I do) and didn't know what I was talking about. Problem is, they had all been active cyclists from the 1970s not the '40s or '50s and had all worn the Greenspot Nomads. Moral of the story ---- We need more really old British chaps on these lists!