And Collison believes the opportunity to play regular football was too hard to turn down after only making one Premier League appearance off the bench for the Hammers so far this season.
He told BBC Radio Solent: “I haven’t been involved as much as I would have liked, so it’s a good opportunity for me to come here and show what I can do.
“I wasn’t on the bench for West Ham at the weekend and the opportunity to come here arose. It’s a fantastic club, which is on the up, and hopefully I can help them and they can help me.
“Hopefully I can come back fitter and sharper and ready to do the business.”
Meanwhile, Jordan Spence has returned from his month-long loan spell at Sheffield Wednesday after starting four games for the Owls.