I taught in inner-city London between 2000 & 2004. White working class boys were the underachieving group in that school at that time.
I now teach in a rural school. We. Have very little ethnic diversity other than new eastern-European immigrants. 40% PP students and low parental interest.
Our biggest issue is PP boys
I don't think that boys' behaviour is worse than girls' in my school. In fact, the poorly behaved girls are vile, compared to the poorly behaved boys. One or two Ks4 girls are really quite unpleasant - rude, entitled, full of the unfairness of life (when asked to get away from the mirror and go to lesson/put phones away/put ties on) Their attitudes are not something they've learned at school. That much is clear from conversations with their parents.