I presume for the purpose of this thread, the 'no go zones' are defined as no go zones for the police. I can list plenty of no go zones for 12 year old girls, most of them having a kebab house on every corner, but for the police I offer you... traveller sites. Some of these are genuine police no go zones and I have heard many accounts of the police
refusing to chase criminals onto sites,
recover stolen property from sites or indeed
enforce the law in any meaningful way. There was a story not long ago about someone being shot at from a traveller site, with a similar refusal to act by the police. A woman local to where I used to live had the contents of her farm repeatedly robbed by pikeys, who would turn up with axes and lump hammers and take what they wanted, and the police repeatedly refused to act. When she herself armed herself with a legally held shot gun and called the police, the police turned up... and arrested her.