Back in the 70's and 80's my German friends coming out to NZ hunting quickly discarded their Loden non-waterproof hunting clothes for our natural wool made Swandri branded bush shirts and "swannies" this latter being a long or short sleeve nightshirt type garment that came down over shorts if wearing them and was quite waterproof. Was popular with our forestry guys too where you could hunt or work all day in the rain, feel a little damp in real heavy rain but staying warm and relatively dry.
My friends took swannies back to Germany and wore them there in deference to their Loden clothing. They only wore Loden when on formal hunts as the rough NZ swannie didn't quite look the part when wearing collar, tie, lederhosen and fancy hat. Shorts and swannies were definitely not in fashion on these occasions. I well imagine the same would apply in England too where the swannie wouldn't meet stiff upper lip approval.
Old photo of one of my German friends and I in our swannies after carrying a good red deer out of the bush, mine hooked up a bit at the front. Bloody hard work carrying an animal that weight on a pole I can tell you.