Jamie George a Six Nations doubt as Saracens fall to Castres - Saracens pass up Champions Cup home tie as Castres stun to win in London - Scotland give first call-up to Saracens fly-half Burke for Six Nations - England hopeful Willis stars as Saracens beat Bristol - Bath inflict record defeat on Saracens; Leicester snatch draw vs Quins - Bath run riot to inflict record defeat on 14-man Saracens - Saracens up to third after comfortable win over Northampton - Saracens serve Premiership notice with six-try victory against Northampton - Lozowski's last-gasp penalty sees Saracens edge Bristol thriller - Harlequins end Saracens' perfect start in battling Premiership win