When they kick at your front door
How you gonna come?
With your hands on your head
Or on the trigger of your gun
When the law break in
How you gonna go?
Shot down on the pavement
Or waiting on death row
You can crush us
You can bruise us
But you'll have to answer to
Oh, the guns of Brixton
a bit later
You know it means no mercy
They caught him with a gun
The Clash - The Guns of Brixton
That song was written in the late 70's about the paranoia of living in an apocalyptic version of Brixton within the context of a Cold War while all sorts of rights were quickly eroded away by the government. The whole album is just chilling if you compare it to what policy makers have actually already done in London and the UK in general (the constant surveillance, the erasure of property, speech and gun rights)
It seems those things have come so close to true, not just in the UK but across the 'western world' where democracy once reigned.