Originally Posted by LookingForAJob
Originally Posted by dash6
"City" Zone was free airspace not many years ago. It did'nt pose a threat then. Why not publish hours of use,and allow access outside those hours?
Ummmmm, well, actually, the airspace around City was established because there were a significant number of incidents involving traffic out of City and on its way toward CAS.
Let's stay logical.
Good Egg was making the point that even when City Airport is closed, Class D is required to keep London safe.
dash6 said that historically the airspace was Class G while City Airport is closed and London survived.
It is not to either of their points that Class D was created to protect IFR traffic. That was not relevant at the time, on a Sunday morning, when City was closed.