Bacardi Walla
Good question. The brief just states that a new control tower would be built close to the new south terminal, viewing two new parallel taxiways that would be built for the replacement runway. New fire station too.
Exisiting runway would remain for use in emergencies, maintenance etc. The MD said on BBC local news when questioned about this said 'this is not included in the current 2030 project but beyond that who know'? .' The avaition world won't stop at 2030'.