Never like SWA without the armour properly glanded. It just doesn't seem right to have all that steel and not use it as it as nature intended especially if its running in a corner sazezone that only us electricians know about. Better for the person banging a nail into it to get a big bang and the protective device to blow than them getting the nail in, touching nail, getting a shock followed by the rcd tripping. Not having a go just a personal thing, rest of the job looks good.