States only believe in their own interests and the narrative always go towards the powerful and the one which won.
That’s the fatal flaw in international "justice" and has been from the start. Where were the people who allowed the nuclear bombing of civilians during the Nuremberg trials? Why was nothing said about the western nation entering the war so late despite what they knew? Because that’s not justice, merely retribution.
Then, you have to considered the role played by secret institutions in democratic countries. Do they serve the citizenship, the national interests (what does that even mean?), the people in power, themselves first and foremost? From history, I wouldn’t trust them very much, even less as a foreigner.
Be wary of any institution or person holding power. Check and balance are deeply needed and we should be horrified every times they are being limited or abused.
If the UK is still serious about being a liberal democracy, this should have sever consequences. I’m sadly fairly sure it won’t.