“If you want plush, if you want opulence, if you want to revel in the theatrical experience, then this winter you are in for a treat with the rebirth of two of London’s finest Edwardian theatres, the Hackney Empire and the Coliseum. Thanks to dollops of lottery cash and the generosity of private individuals these two masterpieces by that greatest of Edwardian theatre designers, Frank Matcham, should open on January 28 and February 7 respectively.” But what about London’s other theatres?