Cherry Red Group’s RPM and el labels have recently turned their attention to a trio of British vocalists who may have fallen under the radar in recent decades.  Happily, comprehensive and essential anthologies for Guy Darrell, Eden Kane, and Gerry Monroe will see to it that these artists are no longer overlooked. Guy Darrell scored one bona fide hit in his recording career – “I’ve Been Hurt,” a No. 12 U.K. hit in 1973, despite the fact that it had been recorded and released six years earlier!  I’ve Been Hurt: The Complete…