LONDON (Reuters) – Benjamin Britten’s searing opera “Peter Grimes” about a sadistic fisherman will be performed in June 2013 on the beach in the English coastal town that inspired it as part of a year-long centenary for the British composer who died in 1976. “We’re going to put a stage on the beach and do it,” Jonathan Reekie, chief executive of Aldeburgh Music, the music festival Britten founded and named for the east-coast town where the opera takes place, said on Tuesday at the launch of the Britten 100 celebration. …