Southend United have signed two former National League-winning midfielders - Darren Oldaker from Swindon Town and former Barnet player Anthony Hartigan.Defensive midfielder Oldaker, 27, captained Chesterfield to the National League title in 2023-2024, before joining League Two Swindon Town last May.He went on to make 40 appearances for the Robins, scoring once in the league and once in the FA Cup. Southend said he had joined for an undisclosed fee.Central midfielder Hartigan won the National lea