O's snap up custodian
By Simon Fudge
Last Updated: 01/01/70 1:00am
The 31-year-old will go into manager Paul Brush's side that will face struggling Bristol Rovers on Saturday at Brisbane Road in Division Three.
Harrison has spent the last three months on loan at Division Two side Peterborough United, where he kept seven clean sheets in 12 matches.
However, Posh manager Barry Fry decided to let him return to Underhill Stadium, after Mark Tyler returned to fitness.
The former Charlton Athletic trainee had a spell at Fulham before moving to Barnet, where he has made over 250 appearances for the club.