I've been wondering about having an oak floor through the d/room, hall
and l/room.

The problems I can see a

* Access to a burst pipe would surely be a nightmare. I have seen
individual planks replaced by cutting the original out with a circular
saw but knowing my luck with houses, there probably would be leaking
pipe at some point.

* Some of the floorboards have warped because of central heating
pipes. Surely this might cause a new floor to lift as well?

Would it be worth changing all the floorboards for new ones (some of
the existing ones are pretty bad).

Also, could I avoid the warping problem?

Thanks.