Horse racing tips: Three outsiders who can smash the bookies on Sunday

SUN Racing's value picks for Sunday's action are below. Back a horse by clicking their odds. LONGSHOT COPPER KNIGHT (4.45 Thirsk) Has a 7lb claimer on board today and was in winning form at Beverley two runs ago. EACH-WAY DOUBLE CABRERA (5.15 Thirsk) Looks on a fair mark for this turf comeback and needed his...