In England you go to jail if you shoot anyone, invading or not. Criminals are the kings.
Here I can state without reservation that there is no lawful reason for any law enforcement agency to do a violent "dynamic entry" into my home, and we do have incidents of LE impostors doing such home invasions in neighboring locations. So I would act as if it were, and most likely, (99% probability, in my humble opinion), unlawful invaders, being that anyone breaking down my security doors is not someone looking for donations to
The 100 Club. Measures appropriate to the situation would be implemented. Dealing with the aftermath would be hard, expensive,and undoubtedly life changing.
BTW, if anyone does ask for donations, that is a great outfit to donate to.
