Green’s Dictionary of Slang

radication n.

also radics, radix, rad
[SE eradication; the Metropolitan Police’s violent and racist attitude towards black youth]

(UK black) the police; also attrib.

[UK]J. Morton Lowspeak 120: Radics (Radix) – the police.
[UK]C. Newland Scholar 71: Wesley an’ dat lot lef’ before I come, case the Rads decided to visit.
[UK](con. 1979–80) A. Wheatle Brixton Rock (2004) 141: He’d seen something to alarm him – a beast van travelling slowly towards them [...] ‘Floyd, look, radication squad.’.
[UK](con. 1981) A. Wheatle East of Acre Lane 142: I wanna blow away a beastman [...] Radication affe get eradicated.
[UK]Observer 10 Mar. 12: There’ll be more shootings. The rads [police] are gonna start getting shot – guaranteed.