Hubble and Simmons off to LeistonJack will be rejoining the Ryman League club, having spent a month with them earlier in the season.
They will be with the Victory Road club for a month, with seven matches scheduled at present before their loans run out.
Jack Simmons and Conor Hubble are heading out to Leiston.
The man in charge will be familiar to both the youngsters, with U's academy coach, and former U's midfielder, Steve Ball doubling up as the Leiston boss.
Both Jack and Conor are expected to feature in Leiston's game at the weekend, a home fixture against Lewes.