Here in the U.S when we have a sitcom along the same lines as Liver Birds, the best we can do is just name it Laverne & Shirley.
Heh. Well, Russ, The Liver Birds is definitely similar in some respects to Laverne & Shirley...though of course, the former has no Lennie and Squiggy analogue, and is set in the early 70s rather than the 50s. For those reasons, I'm guessing that L & S wasn't inspired by The Liver Birds, unlike many other Britcoms that inspired American versions (such as All in the Family being modeled on Till Death Us Do Part, Sanford and Son on Steptoe and Son, Three's Company on Man About the House, etc.)