Boss Paul Lambert swooped for the Gunners' academy product after seeing his options in midfield hit by injury in recent weeks. Lansbury, 20, scored five times in 34 Championship appearances for Watford last season and has also spent time on loan at Scunthorpe. He was part of the England Under-21 squad which beat Romania 2-1 at Carrow Road last month and will come into contention for Sunday's East Anglia derby at home to Ipswich. Lambert told the club's official website: "I'm delighted Arsenal have agreed to let Henri come here. I saw him when he was at Watford and Scunthorpe and he's a quality young player, very positive in his play. "We have been hit with injuries and midfield is one of the areas where we needed strengthening. Henri gives us more options in there which is important."
