Hey, I happen to be a dentist. (Only joking)
Let's close this discussion. While I'm grateful you guys give your free time for strangers like me online, it's hard to have a discussion if you don't care what I say.
One, I said I would not want this topic to be about combi vs system/traditional. That is a valid discussion, but not the main point here. And you seem to be offended by that. Two, I didn't ask about HOW to reconfigure the pipe circuit, I understand how it can be done. I'm asking Pros and Cons of re-running pipe works under the floor vs leaving them on the loft.
I'm not objecting anything. I'm just letting you know that the cost of re-running under the floor is large (removing hallway floorboards, tiled kitchen floor, new pipe circuits etc ...), would it be worth it. So upfront refurbishment cost vs long term benefits. If you think it is best to re-run under the floor, then I will definitely consider it.