I wouldn't be surprised if (The RAF being RAF) these RAF Bren Mk3s were originally ordered by the RAF and then cancelled, just like some of these in the wrap No.4s. You'll be glad to know that things never change.

Latest rumour on the street about the RAF/RN 'New' Joint Strike Fighter (AKA Lightning II) is that the American Defence department are looking into the possibility of cancelling the contract completely which means we can't go it alone and we would then have 2 Royal Navy Aircraft carriers we can't use and can't sell because it doesn't have a catapult!