Birmingham are set to complete a trio of Premier League loans with Carl Jenkinson, Cohen Bramall and Sam Gallagher all poised to join Harry Redknapp's team.
Arsenal duo Jenkinson and Bramall are unlikely to play much under Arsene Wenger this season and have opted to join the Championship.
Saints youngster Gallagher is prepared to drop down a division to secure first team football.
Redknapp will be pleased to have bolstered his squad with promising Premier League talent having picked up four points from four games in the Championship so far.