Ben Tollitt has left Pompey to sign a permanent deal with Tranmere for an undisclosed fee.
The 22-year-old winger has spent the past few months on loan with the National League leaders.
He joined the Blues from Skelmersdale in the summer of 2015 and scored once in 18 appearances during his time at Fratton Park.
Tollitt’s last game for Pompey was the 4-3 Checkatrade Trophy defeat at the hands of Yeovil in August.
During his spell at Prenton Park, Tollitt has scored three goals in 10 appearances.