OK may be not the best options on a pole. But I have had RCD protection all circuits since 1992 approx, and all children as they have bought houses have fitted RCD's within 6 months of moving in if not fitted already.
My father-in-law was odd one out, he was the electrical project director for Liverpool and when he semi-retired IOM hospital boards, yet his house had an old Wylex fuse box until he died and house sold. I was surprised when I bought this house to find two distribution units, one a split load consumer unit the other an old Wylex fuse box. Why the previous owner had decided to do it that way I don't know, but looking at the central heating which was supplied from to independent distribution units with three FCU's plus to turn on house you had to walk outside down a set of steps and back into the house one floor down and plug in the pump, clearly they did not have much idea. Seems likely they used the open fire.
On return from Falklands in 1989 I found where I worked they had gone RCD mad it seemed, with a 1 amp feeding 500 mA which fed 100 mA which fed 30 mA and the Water proof main distribution unit (WMDU) fed all the sub units and so on.
So the RCD has been around for some 30 years in common use, did see the first ones around 1975 in Theatre Clwyd so clearly out well for 1990 but by 1990 the old ELCB-v had been outlawed and there was a move to replace them with the new RCCD when ever found. Oddly it was only when replacing them I had come across them, never remember fitting any.
But after 40 years I would have expected 80% or more of homes now have them fitted at least for some circuits, but reading these pages it does not seem to be as common as expected. Yet as yet no one has voted non, or ELCB-v.