Scarlets plan to hit Bath with power hit by Leigh Halfpenny injury

• Full-back fails late fitness test before key European Champions Cup tie• Sam Underhill returns for Bath in sole change to impress Eddie JonesThe Scarlets are aiming to invoke the spirit of 2002 at Bath on Friday night in their quest to reach the knock-out stage of the European Champions Cup for the first time in 11 years. Only victory will do for the Pro12 champions in the most keenly contested of groups with one point separating third from first in the table. However, a late injury to Leigh Halfpenny means the full back will be a key loss.When the Scarlets last played Bath, it was as Llanel…