Holders and three-time winners Saracens will begin their Champions Cup defence against French giants Racing 92 in Paris on 17 November.
Billy Vunipola is determined not to disrupt England's World Cup plans and regrets the impact of defending Israel Folau's anti-gay comments on his team-mates.
Lock Dominic Day leaves Premiership side Saracens after two seasons to join Major League Rugby side San Diego Legion.
The 2019-20 Premiership season will start with Bristol hosting West Country rivals Bath on Friday, 18 October.
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Wales and Lions back Liam Williams discusses his stammer with ex-Wales captain Gareth Thomas for Scrum V.
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