SIR Elton John's husband David Furnish has put him on a strict diet to help him lose weight. The Sacrifice hitmaker has piled on the pounds lately and Furnish is determined to help him adopt a healthier lifestyle. He says, "I can't change him but I want him to be as fit and physically and mentally sound as he can be. "The message has gone out to the people on the road: no bowls of M+Ms in the dressing room. I don't want nacho chips lying around. And he's drinking water now rather than diet coke."