I think they saw much more use in WW1 than in WW2, and probably very little use by the introduction of the No.4.
I bought a couple of unissued ones 25+ years ago, when you could pick them up for peanuts at militaria fairs, and my father, who had joined the Army in 1944 and served until 1948, told me he had never used one or ever been issued with one during his service.