Newcastle Falcons have tied down captain Will Welch and back row colleague Mark Wilson to long-term deals.
Former England Saxons centre Dominic Waldouck will join Newcastle Falcons on trial.
Newcastle have suffered a major injury blow as back-row forward Nili Latu has been ruled out for around five months.
Saracens will start their Premiership title defence against Worcester in the London double header on September 3.
Newcastle Falcons have signed hooker Kyle Cooper from Super Rugby side Sharks.
Champions Cup holders Saracens have been drawn against Toulon while Bath will meet Bristol in the Challenge Cup.
Giovanbattista Venditti is ending a frustrating spell with the Newcastle Falcons to return home to Italy to play for Zebre.
We put the best in the Guinness PRO12 up against the best in the Aviva Premiership in our head-to-head teams of the season.
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Barbarians v South Africa
5th November 2016