Lansbury started out at Arsenal from the age of nine. A combative midfielder, he has captained England Under-16s. He has also been capped at U17, U19 and U21 level.

Lansbury made his first team debut on October 31, 2007, in Arsenal's 3-0 League Cup win over Sheffield United.

Alan Smith, a former Arsenal striker, described him as having 'huge potential' and on July 1, 2008, Lansbury signed his first professional contract.

He joined Scunthorpe United on loan on deadline day in February 2009, and in the summer another temporary switch came with Watford.

Lansbury impressed for the Hornets as he made 37 league appearances for the club, scoring five goals.

In November 2010, a return to Norwich beckoned, again on a temporary basis. And he demonstrated his ability once more as he netted four times in 23 league outings.

During the 2010-11 campaign, Lansbury was handed a Gunners start against North London rivals Tottenham in the League Cup. And he opened the scoring as Arsenal triumphed 4-1.

Lansbury was tipped to play a role for the Gunners in the 2011-12 season, but, after two substitute apearances, he was loaned out to West Ham on transfer deadline day.

Arsenal boss Arsene Wenger has previously said of Lansbury: "Henri has the talent to play for Arsenal football club. I believe in him."