Make an risk assessment of the desired airspace options.
If wanting to make a controlled airspace, make sure it is not larger than the absolute required, which means, contain instrument approaches and departures and the traffic circuit.
Make sure if you’re going for some sort of uncontrolled airspace, that airprox and collisions are covered by the assessment, with the risk included where there’s no atc to intervene. And that assessment you send to the CAA for approval.
Hence, ever any airprox, or collision, it’s approved by the CAA.
