Date of birth
Promising goalkeeper Hadler signed a new two-year contract at the club in June 2016.
Yet to make a first-team appearance for the club, Hadler has served loan spells at Folkestone Invicta, Tonbridge Angels, Grays Athletic and Gloucester City.
He initially joined the Gills as part of the club’s schoolboy programme, but left aged 15 to concentrate on his studies, completing his A-Levels at Canterbury’s Simon Langton Grammar School for Boys in 2014.
Hadler rejoined the club’s academy – initially on a part-time basis - during the 2012/13 season, and signed his first professional contract in the summer of 2015.