Eleven Hanover Square W1S Timeline News and progress updates from Eleven Hanover Square new development in W1S Post a new milestone Following the handover of the retail unit on the Oxford Street side, the office accommodation at Hanover Square is now completed, reports Campbell Architects. 28/04/2017 by Buildington Westminster City Council has received planning application for: Complete demolition of 287-291 Oxford Street and 11-12 Hanover Square and redevelopment to provide a... 07/03/2013 by Buildington