Re:the space port
I'm no expert of course but you might imagine whole sections of the North Atlantic track system and Airway system to the FIR boundary would need to be quarantined for either the departure or arrival of a Space-plane.
The total intellectual Pit of the mindset of people that make suggestions like this is beyond belief. The same goes for the "Space ports" of the outter reaches of the Scottish mainland.
Baikonur and other launch sites have a huge advantage, possessing by virtue of their remoteness; enormous volumes of un congested Airspace. (Not so sure about the Kennedy Space Center)
This is one for an orbital launch specialist really, but the UK is an especially bad candidate - Literally a No Brain-er.
CAT III