Southend United's full Checkatrade Trophy Group list has now been confirmed.
Today (Tuesday 18th July) at 1:40pm the draw took place to confirm which invited U21's side would join Southend in Southern Group B.
Blues already knew two of their upcoming opponents prior to today's draw, these two teams were Cambridge United and Colchester United and now they will also face Southampton U21's.
Fixture dates and ticket details will be announced in due course.