Green’s Dictionary of Slang

(UK Und.) HMP Wandsworth, in south London.

1998		J. Hoskison Inside 14: ‘Wandsworth doesn’t look too good.’ ‘It’s the worst. Wanno’s the fuckin’ worst.’.
2004		Guardian 7 Jan. 6/2: Wanno and Brixon are dustbins, nothing more, nothing less.
2017		1011 ‘Play for the Pagans’ 🎵 Jakes had man in Wano and Scrubs, that’s a minor setback.
2020		G. Krauze What They Was 251: HMP Wandsworth — Wanno — is an old Victorian prison.