@Whale said:
The fact is that once a pipe or indeed any item is attached to the common property (wall) such that the property would be in some way left damaged should that item be removed (in this instance by masonry fixings), then that item becomes part of that common property.
I sorry Whale but I don’t agree with this sweeping statement that anything attached to common property automatically becomes common property.
If that was the case then fitted kitchens and bathrooms (in fact anything att to a common wall inside the unit) that happen to be att to a common wall would be considered common property which they patently are NOT.
Both fitted kitchens and gas pipe are att to the common property and in the lot air space.