That about sums up Pontefract pal. I was born and raised there until leaving for Barnsley :S
its the only time you need a harness on a ladder lol!!!
I personally dont think it will be long untill you have to wear an harness and clip onto an inertia block to climb and external ladder
Its been mandatory to do that even on internal ladders on CB&I projects in Australia for a few years now. I would assume it is a group policy which will be in effect all over the globe.