Southend United have completed the permanent signing of Cian Bolger from Bolton Wanderers.
The 22-year-old defender leaves the Trotters without making a senior appearance since joining from Leicester City 18 months ago.
Bolger re-joins Southend for a reported £25,000 fee after a brief spell on loan with the Shrimpers last season.
He made one appearance for the League Two side before getting injured and missing the rest of his loan stint.