We shouldn't be allowed near tools
Sadly, after further digging (and a consultation with Head Pole), we learned that the tiles only covered half of the hallway and to restore them would be difficult to say the least. So long story short, (after much frantic Polish panic) - the conclusion was that we would stick with plan A. Restoring the tiles would have almost certainly involved keeping the current floorboards, and therefore not using the Welsh Floor Boards (WFB). And after the well-documented saga/adventure that was the WFB, I don't think I could bare it.