Salmon heads down to Saracens
The 27-year-old has made six competitive appearances for the Falcons since joining from Exeter Chiefs, having previously played for Rotherham and Darlington Mowden Park.
Director of rugby Dean Richards said: “This move will hopefully give Toby the chance for some valuable game time, and we wish him all the best during his time with Saracens.
“With the Championship season now underway we also have Conrad Cade at Doncaster and Cameron Nordli-Kelemeti at Jersey, who will also both benefit from the experience.”