Green’s Dictionary of Slang

dangerous, off limits, out of bounds; usu. as no-go area n.

1972		Daily Tel. 5 May 9: Is Liverpool to be a no-go area?
1993		R. Shell Iced 46: There are no-go areas there, like the toilets.
1999		N. Cohn Yes We Have No 259: I’m warned [...] that it’s a no-go area after dark.
2001		A. Sillitoe Birthday 54: It used to be pleasant living in this town, but some areas are no-go now.
2016		Eve. Standard (London) 29 Feb. 🌐 There should be no-go areas in London.