[simonswords82]

It's amazing how little governance there is in the sky for general avaiation - aka small planes flown by private pilot license holders. When I studied to get my PPL it was the one thing I learned that shocked me.

There are NOTAMs (Notice to Airmen) that tell us about new structures that have been erected that could be problematic. NOTAMs also tell us if parts of the sky are off limits, for example if an airshow is on.

Other than that, and I am generalising a lot, there is no air collision avoidance in the majority of private planes here in the UK. Your two best mechanisms of defence are your eyes, and keeping one ear on the radio to get a feel for where everybody else is. If they're not too busy air traffic control will warn you about other planes in your vicinity, but it is not mandatory. There are also TCAS (https://en.wikipedia.org/wiki/Traffic_collision_avoidance_sy...) systems you can bolt on to your plane, or might come with new planes, but they're not mandatory and I've yet to fly a plane that comes with one.

As for finding fault. That doesn't happen in air accident investigations. Air Accident Investigation Reports (https://www.gov.uk/aaib-reports) are specifically engineered to focus on the problem, and find a solution to prevent a repeat of it. They are not designed to apportion blame, but instead learn from the mistake and build mechanisms for ensuring that the same outcome is mitigated. That's not to say you won't be prosecuted but that's a separate process.