I'm familiar with much of what you say.
But I plan to find out more.
By what process was your right to possess guns reduced?
Can't remember, but it has been a staged process to get where we are today.
In the late 1700's my family raised and armed its own regiment in northern Ireland.
The government disbanded such regiments in the 1800's.
Mostly such laws are parliamentary bills. if anyone is brave enough to defy the law and is prosecuted, provided they can take it as far as the supreme court, they may or may not win their case. That law then become either established or thrown out.
laws on gun control have never been thrown out.
At the present time Appeals can go the the European court of Justice. But they have never thrown out a gun law either.
Unlike your supreme court ours is totally non political (they are even banned from voting in elections) nor can they join political parties. None of our courts have a political element to them.
Interestingly all supreme court Judges are law lords and can sit in the house of lords on the cross (non political benches) They used to sit and hear appeals there. Only recently have they move out into a purpose built supreme court building. (But they can still sit in the lords.)