WRA Co 17 dummy cartridge

Also from today’s Bisley meeting is this 30-06 headstamped WRA Co 17. It has a struck primer, 4 very small holes drilled straight through and staggered at two heights on the case body. There’s no distance piece inside, but the brass bullet is soldered into the case.

With the layout of the holes and the soldered bullet it has a very British look to it, but does anyone know anything definite about it ?