The popular shows, which have become the mainstays of the weekday schedule on BBC1 and BBC2, spawned the lifestyle genre and made stars of presenters such as Carol Smillie, Charlie Dimmock and Laurence Llewelyn-Bowen. They have also provided a serious boost to the DIY industry. Last year a survey showing that Britons spend an average £100 a week on home improvements cited the shows as a major factor in the DIY products boom.