MIDFIELDER Conor Henderson has signed for the Mariners on a deal until the end of the season.
The 24-year-old, who has just spent a month with the Mariners on loan, was released by his parent club  Crawley last week. Â
He started out at Premiership side Arsenal, making one appearance for the Gunners back in 2011, during the 5-0 victory at home to Leyton Orient in the FA Cup.
He enjoyed a brief spell at Coventry a year later, before making a permanent switch to Hull City in 2013.
Henderson only featured once for the Tigers, but a successful month at Stevenage earned him a move to Crawley in 2014.
Born in Ireland, the midfielder has made 20 league appearances for Crawley, scoring twice.