The highly-regarded Cypriot under-21 international, who will wear the number 24 shirt, arrived at Crabble on loan from League Two side Leyton Orient in November.

The 19-year-old made his debut for the O’s in the FA Cup fourth qualifying round tie at Dagenham & Redbridge in October 2017 before signing a two-year deal with the club in May 2018.

During his time with the O’s Sotiriou, who made three appearances for his club in the National League, has had loan spells with Bishop’s Stortford, Chelmsford and Hampton & Richmond Borough.