I personally don't like trunking, especially in a property of that age, its wholly inappropriate imo. I would rather lift carpet and run along gripper rod as a last resort, but realistically its usually just as easy to follow the path already used by the plumbers for the CH/HW or the electricians for the rewires done over the decades or even the coax/sat installers who had gone before, obviously with appropriate spacing. Once you expose some of the floor boards, its usually obvious/easy to do it properly. It was also nice that someone had thought about this previously as the first floor landing was accessible from the pantry under the stairs via a cleverly disguised access hatch that doubled up as an in ceiling light. I have a nasty feeling this wasn't safety glass and is a potential death trap, but not my monkeys, not my circus.
Externally a lot can be hidden behind drain pipes and guttering, i’ve even resorted to hiding cable in them in the past as a last resort, or run inside soffits, or buried and brought in via air brick for a non destructive install - a plant pot can hide a multitude of sins. A lot of people moan about running cable, but its really not the ball ache its made out to be unless the house belongs in an episode of Hoarders.