By NEALE HARVEY

CHIEFS talisman Jack Nowell returns as Exeter embark on a revenge mission against Castres to keep their Champions Cup hopes alive.
Nowell has recovered from the hamstring injury he suffered at the back end of England’s autumn campaign and replaces Phil Dollman at full-back – good news for both club and country with the Six Nations three weeks away.
Exeter were beaten 29-25 in October by a Castres side reduced to 14 men. Lock forward Mitch Lees admits there is no margin for error if they are to avenge that loss and head to Munster next Saturday with everything t...