A CFMU would be a start.
If Heathrow has a reduction in capacity,then flow rates are reduced and aircraft within Europe are given slots,often with big delays and cancellations.
Hong Kong doesn't and all their holding is done in the air,or Clearance delivery trying to figure out departure oceanic separations into the Mainland or other FIRs.
The airspace is totally different.The LTMA is extremely buy and tight.Heathrow has to hold at the 4 inbound holds and then short vectors to final.
Hong Kong never used the inner holds,as that it seen as losing face.They vectors all over the place.
The Chinese mailand also swap miles for minutes.
HK needs to get tough and slap on proper flow measures,instead of sorting out everyone's problems.
