The article says; "The example used was privately owned and had covered a considerable mileage before the tests", so perhaps it was not present for the photo shoot, as the others are probably new. It also states " Stiff suspension results in a rough ride on any but the smoothest surface..."
Another photo shows the 5 cars but no KR in a casual group outside the pub, and is captioned DAWN PATROL - After a week's commuting the miniature cars assemble at the Red Lions, Bledlow (Bucks?) for detail tests around a country circuit and over a level measured distance. The trees are mostly leafless, perhaps buds and small leaves but definition not great. the book's index states: Motor, April 11th 1956, but completely fails to mention clothing, footwear or other matters which are of amusement to us but not strictly pertinent to a serious article!