The
Daily Mail Home Guard being inspected by the paper's proprietor, Lord Rothermere, with a mixture of .303 and .30 ones (and some early Sten guns).
Full size
http://www.fototime.com/FDDFF5590744049/orig.jpg
Later there was a concerted drive in Southern Command (and presumably other commands, though I have not so far located any other files in the Public Records Office) to locate all .303 weapons in the HG and and withdraw and exchange them for .30 ones. Some static Army units were also subject to this.