46. Royal Opera Arcade Where? West of Haymarket, up the backside of the Phantom of the Opera, the Arcade links Charles II Street to Pall Mall. What? As Westfield Shopping Centre prepares to open in Shepherd's Bush, it's worth looking back to where it all started. Royal Opera Arcade was Britain's first covered shopping centre, completed in 1818. The chief architect was John Nash, who also found time to give us Regent Street, Regent Park,......