England captain Dylan Hartley signs a new Northampton Saints deal and is reappointed as the Premiership club's skipper.
Premiership champions Exeter will begin their title defence at Gloucester when the 2017-18 season starts on 1 September.
Wing George North and centre Robbie Henshaw will play no further part in the British and Irish Lions tour in New Zealand.
Tom Wood will miss England's tour of Argentina after being banned for six weeks for stamping in a game for Northampton.
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England rugby captain Edgar Mobbs lost his life at the Battle of Passchendaele on 31 July 1917.
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