NEW WARDROBE By Mary-Jo Payne Whenever Mary-Jo finishes her jobs around the house, that's when she was tempted to reach for a slice of bread and butter - but not any more! As part of the BBC's Big Challenge campaign Mary-Jo has decided she's going to lose weight. Butter and gravy are out and fruit and veg are in. She's even going to buy a tracksuit and join a gym. But what will make her happiest of all will be fitting into all those clothes which are hanging unworn in the wardrobe.