Henry & Brian Greenhalgh, Manchester UK, mid 20th century

Henry V. Greenhalgh married Eileen McArdle in Manchester in 1939.I think this Eileen could have been my mother's cousin, but I'm not sure it's the same person.Brian Greenhalgh was born in Manchester in 1940, mother's name McArdle, so he's almost certainly the son of this couple, and might be my second cousin.I'd like to make contact with Brian and/or his descendents.