At this moment in time there is no planning application in for any development in relation to the taxiway system reconfiguration or rehabilitation !
Could of course be a number of reasons.
1. They have forgot to apply .........................oops
2. They don't think they need to apply.............. oops !
3. The CAA have not signed off or agreed to any proposed plans.
4. They have no intention of completing the long term project and are prepared to "wing it" under its current state due to the financial costs involved.