With one match to play, Southend are poised. They are on 47 points, outside the bottom 4 on goal difference only. It's squeaky bum time for them though as two out of the three teams below them can overtake them next week if they lose at home to Sunderland. Sunderland themselves have been coasting lately: they are assured of a place in the playoffs, cannot break into the top 2, and their last 5 games have been DLWDD.
Indeed, Southend really need to win as Plymouth and Scunthorpe play one another next weekend. The winner of that match will overtake, and therefore relegate, Southend, and if it's drawn, Plymouth, currently below Southend on goal difference, will overtake them. The other team who might overtake Southend are Walsall, away to fellow strugglers Shrewsbury. Walsall won 3 - 0 yesterday.
I don't know if this will have any implications for the totally ludicrous planning application which is still ongoing for SUFC to build an out-of-town stadium about twice the size of their existing ground, when they very rarely get a capacity crowd (12000) in any case.