Fosu-Mensah, 25, most recently played for Lladudno in the Cymru North. Before then, he featured for Airbus UK, where he scored 16 league goals in 22 appearances during the 2017/18 season.
He has experience in the Northern Premier League, playing for Marine, Hednesford Town, Southport and Ashton United.
Fosu-Mensah is the older brother of Manchester United player Timothy Fosu-Mensah.
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