Anyone who has ever watched a Western movie will recognize the method of carriage of individual rounds as worn by the fellow at right. Probably got a fitter to sew some spare webbing or canvas onto his web belt, though I wonder if you couldn't just flip the 37 Pattern web belt inside out and force the cartridges into the web loops? Probably not, but there is almost always more than one way to skin a cat.
Given those guys were on the continent for 11 months and in England for 4 years on average, and damned little of it was spent actually fighting, no surprise that they would spend a little bit of time personalizing their kit...
