Tannhäuser " review
Royal Opera House, LondonTannhäuser has been described as the "most boring of all great operas", and it remains a work that separates the truly committed Wagnerites from the merely interested. But while it would be wrong to claim that every minute of the Royal Opera's new production " the first here for more than 20 years " is edge-of-the-seat stuff, in fact it is never boring, thanks most of all to the exceptionall…