Arsenal moved to their London Colney base in 1999, with Wenger designing the facility to a specification that made it widely regarded as the very best in the Premier League. Chelsea, Manchester City, Manchester United and Tottenham Hotspur have since built even more modern training centres and, amid the backdrop this season of the worst injury record in the Premier League, Arsenal are preparing to seek planning permission on projects that, over the next three years, will run into the millions of pounds.