While Britain shivers in wintry chill and buses skid on snow-covered streets this laughing- eyed , 19- year- old film star - Audrey Hepburn- skips out of her studio and goes tobogganing at Elstree, Herts. Miss Hepburn is currently filming for Associated British. She has a leading role in the new picture, 'Laughter in Paradise' December 15th 1950