That is just daft. They did a similar thing where I live when the World Cup footie was on. Everybody got a leaflet about hanging flags outside and in windows. My answer to that is if ya don't like our union jack ya know where the door is
Ironic the Housing Association is called Flagship.
What they are really saying by asking him to remove the flags is 'You are a racist nationalist, we don't like it cos it might offend some people so get theose flags down'. Some people seem to spend their lives beating themselves up over a guilty conscience for something they needn't feel guilty about at all - a love of one's country.
Having said that, I've always thought anybody hanging a flag on their home needs their bumps felt - pillocks Just, er, not for me....