Pullthroughs as well as the spliced rope handles on the ends of hundreds of different types of chests, including the Bren were made by prisoners for pocket money. Two prisons that are known for this were Winchester and Portland. I know this from a former worker at Elliots of Newbury who made Bren chests (they also made Horsa gliders among much other stuff) as they used to receive sacks of handles to fit the chests and the handles were strung together using pullthrough material. I THINK that these prisons also made the gun ropes for 25 pounders
Amazing....... another piece of total Enfield related crap that I'd learned along the way and never thought that I'd ever pass on. It just needed some to ask the question........