Benjamin Britten Lord Harewood called it "the first genuinely successful British opera, Gilbert and Sullivan apart, since Purcell." Dismayed by the in-fighting among the company, Cross, Britten and Pears severed their ties with Sadler's Wells in December 1945, going on to found what was to become the English Opera Group. A month after the opening of "Peter Grimes", Britten and Yehudi Menuhin went to Germany to give recitals to concentration camp survivors. What they saw, at Belsen most of all, so shocked Britten that he refused to talk about it until towards the end of his life, when he told Pears that
NI Opera McKay, Conor Mitchell, Ed Bennett and Christopher Norby, together with new libretti by writers including Mark Ravenhill and Frank McGuinness at the new MAC theatre in Belfast, in the company's latest collaboration with the Ulster Orchestra. The production was directed by Rachel O'Riordan and designed by Gary McCann. These new works travelled to the Southbank Centre in London in July 2012. In July 2012 the company produced another opera by Benjamin Britten, "Noye's Fludde". This site-specific production was performed in Belfast Zoo in August 2012, before travelling to Beijing as part of the Beijing International Music Festival in October 2012,