West Ham United have allowed Pablo Barrera to join Real Zaragoza on a season-long loan.

The 24-year-old has been loaned out after struggling to adapt to life in London since arriving from Mexico because of language difficulties and personal reasons. He started the 2-1 defeat by Aldershot Town on Wednesday night, before travelling to Spain on Thursday for a medical.

Barrera joined the Hammers from Club Universidad Nacional in July 2010. He made 21 appearances last season and then appeared in the 2-0 pre-season victory over Zaragoza. His sole competitive appearance this campaign before the Aldershot tie was as a substitute in the opening-day defeat by Cardiff City.

Zaragoza and former Mexico manager Javier Aguirre could hand Barrera his debut in the club's home meeting with Real Madrid CF on Sunday evening.