There are many reasons why 23 is NOTAMed out of action (and probably won't ever come back):
-The top seven stories of our new tower is being built just by the royal suite....Due to move on October 28 now....
-There are two remote parking stands just off 23 in the old grass area between the old blocks 74 and 54
-There's a big white pointy thing parked on the shoulder of 23 abeam the touchdown point.
-Permanent concrete barriers have been placed to along the edge of 27L to the north at the 23/27L intersection to restrict that intersection to the width of a taxiway rather than the width of runway 23.