The International airport, and each regional airport will have 2 Airbus H225 for the royal family. This is designed to allow for quick, and expedite the travel. If I was to need to go to the airport, it will make more sense to have a helicopter fly to the residence, and pick me up. And since every regional airport will have 2 Airbus H225, this will assure that I will have the resources needed. The helicopter can fly to the destination when needed, and if the site does not support a helicopter, there will be a motorcade at every regional airport since the regional airports can not support the transit aircraft that will support the motorcade.
The reason for the choice of the H225 is simplicity, and uniformity. All government helicopters will be the same. This makes it much easier to train pilots on 1 platform rather than many platforms. With that said, the H225 will also be the helicopter as provided for the Royal Guard. The helicopter will be intended to allow for a small space for doing work or signing new laws. However, it might not make too much sense to do everything while flying the helicopter. Keep in mind, an H225 as an escort helicopter may only be able to support 8-10 passengers. The royal family’s helicopter – about the same. The helicopter is intended to only be in flight for a couple of hours at most, and intended to go from site to site.