There is a new force sweeping across Britain. Armed with a lump hammer, she is determined, destructive and leaves scenes of devastation in her wake. Who is she? She is the female DIYer and her handiwork makes even the most ineptly bodged wallpapered spare room look like the Sistine Chapel. DIY used to be man's work, like lighting the barbecue or checking for burglars if there was a bump in the night. But that was before the evil genius behind Changing Rooms inflicted MDF on the nation. Even four years ago, when I started filming the BBC's DIY SOS, female addicts were a rare species. The people we met, whose home-improvement attempts had resulted in catastrophe, were almost invariably chaps. I'd find myself looking at yet another pile of rubble that used to be a kitchen and wondering if demolition was another side-effect of testosterone, like wanting to catalogue your record collection.