UK has its own problems, look at the whole Dankula debacle, they aren't a free country imo. Idk about no go zones but it's honestly not like we don't have them here,  I've lived in chicago my whole life and there's plenty of neighborhoods I'd never step foot in, my concern is liberty more than safety. 
Also if you dont want to take all the guns,  good for you,  but there are plenty of people that do and i'm not giving mine up any time soon