Jon Rouse is head of CABE, an organisation that has been referred to as the &“design police&”. He wants to see better house design, higher densities and more pre-fabrication. And he has a warning for those housebuilders not prepared to change. Ben Roskrow reportsHousebuilders, apparently, fall into two distinct categories. The &“doers&” and the &“recalcitrants&”. The &“doers&” are making a …