Is the use of 3mm sleeving on the CPC for ring main (2.5mm T&E) and lighting (mix of 1.5mm and 1.0 mm) switches, sockets etc likely to fail a PIR or other inspection - if only on the basis of "good workmanship and practices" please?
I've been using it as I had a reel and TLC had nothing smaller in stock. But a comment overheard at the Screwfix trade counter has left me a bit bothered, and I'd rather re-do the work now than later.