Leyton Orient's young defender Aiden Palmer has signed a new two-year contract with the club. The 20-year-old has made six first-team appearances this season as understudy to regular left-back Matt Lockwood.
Boss Martin Ling said: "I'm pleased that Aiden has put pen-to-paper on his new contract as it firms up the left back position in our squad.
"He thoroughly deserves his new contract and he will continue to be a valuable member of the squad."
Ling added: "Every time that Aiden has had the chance to express himself in the first team he has done his job fully, and he will be pushing Matt Lockwood for his place at all times next season."
Out-of-contract quartet Glyn Garner, Glenn Morris, Adam Tann, Craig Easton, Luke Guttridge and Gary Alexander are still yet to decide on their futures at the club.