 Josef Locke was a real Irish tenor who enjoyed great success after  the Second World War, to the extent that, in 1948, he was earning  approximately £2,000 a week. Then in the 1950s the taxman became  interested in his earnings and Locke subsequently disappeared.  Around about the same time, a new singer of similar build and vocal  style called Mr X started appearing in clubs and everyone started to  believe that this was in fact Locke under a new guise. Among those  who were particularly convinced were the legions of women whom Locke  had reputedly slept with, as the man had an enviable reputation as a  ladykiller.