Alderton back at Southend
Alderton joined The Shrimpers on a short-term basis at the end of last season, after being released by Millwall.
The tough-tackling midfielder figured as a substitute twice for Southend as they closed out their Third Division campaign.
Shrimpers boss Rob Newman did offer the 19-year-old a deal at the end of the term but Alderton had been non-commital.
Newman has invited Alderton back for pre-season training and is giving the youngster a chance to impress.
"At the end of last season we offered him a deal," Newman told the club's official website.
"We asked him to come back in for pre-season training but we hadn't heard anything until he rang Crowny on Tuesday.
"It's quite good because he wasn't too bad last season and now it's just a case of seeing how he does in pre-season."