|European Champions Cup: Bath v Scarlets|
|Venue: Recreation Ground, Bath Date: Friday, 12 January Kick-off: 19:45 GMT|
|Coverage: Listen live on Five Live Sport Extra, BBC Radio Wales and BBC local radio and on the BBC Sport website.|
Scarlets have been forced to reshuffle their team for Friday's Champions Cup tie at Bath after Leigh Halfpenny and Johnny McNicholl failed fitness tests.
Wales full-back Halfpenny, 29, has not recovered from a chest injury.
He and wing McNicholl were initially named for the match, now Rhys Patchell moves to full-back from fly-half with Paul Asquith switching to wing.
Hadleigh Parkes moves from the bench to take Asquith's centre slot.
However, Wales internationals Scott Williams and Gareth Davies both return from injury for a match Scarlets must win to keep their qualification chances alive.
Patchell is replaced at fly-half by Dan Jones.
"It's a must win game for both sides, it's like a knock-out game in itself," said Scarlets coach Wayne Pivac.
|CHAMPIONS CUP POOL 5|
Scarlets: Rhys Patchell; Paul Asquith, Hadleigh Parkes, Scott Williams, Tom Prydie; Dan Jones, Gareth Davies; Rob Evans, Ken Owens (capt), Samson Lee, Tadhg Beirne, David Bulbring, Aaron Shingler, James Davies, John Barclay
Replacements: Ryan Elias, Wyn Jones, Werner Kruger, Lewis Rawlins, Josh Macleod, Aled Davies, Steff Hughes, Will Boyde