GUINNESS Premiership leaders Gloucester have been forced into changes ahead of tomorrow's west country derby against Bristol at Kingsholm (3pm).
Despite winning 20-13 away to Newcastle two days before Christmas, head coach Dean Ryan has made key alterations for the sell-out Kingsholm clash.
Up front, Carlos Nieto is replaced by Christian Califano at tight-head, Luke Narraway switches to number eight in place of Gareth Delve (knee) and Akapusi Qera returns at openside after recovering from a wrist injury.
In the backs, Rory Lawson returns at scrum-half in place of Gareth Cooper, who damaged a hamstring at Kingston Park and Willie Walker comes in at full-back in place of Iain Balshaw, who has a gashed knee.
Andy Titterrell is also ruled out which means Jeremy Paul comes into the squad for the first time since the end of November and there is also a recall for scrum-half Mike Prendergast.
"It is unfortunate we have players unavailable tomorrow but I don't want that to detract from our preparation - it is up to us to go out and produce a performance - that is the only thing that matters," head coach Dean Ryan said.
"These derby games are very special for the supporters and I think Kingsholm will be a magnificent sight tomorrow with a capacity crowd but from our point of view we approach this like any other game, we will be focused and ready for what will be a very intense occasion.
"We know Bristol are a very good side but it is up to us to get our game right and play well."
Gloucester's forwards have a tried and trusted look to them with Nick Wood and Olivier Azam packing down alongside Califano.
Marco Bortolami will skipper the side from the second row alongside Alex Brown, while Alasdair Strokosch, Qera and Narraway complete the back row as Gloucester look for their 16th successive home Premiership victory - their last home defeat was against Wasps in May 2006.
In the backs, Ryan Lamb, who has signed a new two-year contract extension, will partner Lawson at half-back, while Anthony Allen and Mike Tindall will be the centres.
James Simpson-Daniel, who will make his 100th Premiership appearance tomorrow, will line-up alongside Lesley Vainikolo and Walker in the back three.
Walker's last start was in the number 10 shirt against the Dragons in the EDF Energy Cup in November but he came off the bench against Bourgoin a fortnight ago and scored a try in the second half.
"Tomorrow is about us producing a performance we can be proud of because this game is vital in its own right," Ryan added.
"If we can do that then we are capable of beating teams but it is up to us - we must get it right."
On the bench, hooker Paul, who has made two starts in the EDF Energy Cup, comes into the Premiership squad for the first time this season, as does prop Jack Forster. Will James and Peter Buxton complete the forward options. Prendergast and Chris Paterson (ribs) return to the squad and the final place is taken by centre Leon Lloyd.
GLOUCESTER (v Bristol, tomorrow 3pm): Willie Walker, James Simpson-Daniel, Mike Tindall, Anthony Allen, Lesley Vainikolo, Ryan Lamb, Rory Lawson; Nick Wood, Olivier Azam, Christian Califano, Marco Bortolami (capt), Alex Brown, Alasdair Strokosch, Akapusi Qera, Luke Narraway. Reps: Jeremy Paul, Jack Forster, Will James, Peter Buxton, Mike Prendergast, Chris Paterson, Leon Lloyd.
Argentine international Mariano Galarza made his Gloucester Rugby debut on Sunday afternoon, and despite a disappointing reverse to Sale Sharks, the giant Puma was just glad to be making his long-awaited bow in Cherry and White.
Having skippered Scotland to a hard fought 25-13 defeat against England at Twickenham on Saturday, Greig Laidlaw spoke of the frustrations of his side doing so many good things and making real progress as a team but still finishing on the wrong end of the scoreline.
GRTV caught up with Neil McCarthy as he was unveiled as the new Head of Academy. The ex-Gloucester front rower is looking forward to getting to work with the vast arrays of talent in the Academy and across Gloucestershire.
Although understandably disappointed to see Northampton snatch a 33-33 draw with a last gasp try on Saturday, Gareth Evans told GRTV after the game that the result shows how far Gloucester have come as a team this season.
Gloucester scrum half Greig Laidlaw spoke to GRTV after the 33-33 draw with Northampton Saints on Saturday, and the Scotsman described how the hosts played some great rugby, but will rue not holding the lead which keeps them in touch with the top seven.
Although Gloucester could take many positives from the 33-33 draw with Northampton Saints on Saturday, centre Bill Meakes admitted it was a strange feeling at the final whistle with Gloucester having probably done enough to win the game.
Speaking after the 33-33 draw with Northampton Saints on Saturday, David Humphreys admitted that he was happy with many aspects of the team's performance but regretted a missed opportunity to defeat the Premiership champions.
Hartpury U18s won the AASE league for the sixth year in a row last week beating Filton College in the Final at Allianz Park by 50 points to nil, while Bromsgrove School won their first NatWest U18 Schools Cup.
Gloucester Rugby would like to inform supporters about an exciting opportunity for you to raise money for your chosen charity or chosen cause. 2015 is an exciting year for Gloucester, with Kingsholm Stadium hosting four fixtures for Rugby World Cup 2015.