Best rack of lamb ever I have tasted was on a Royal Caribbean cruise ship served with superb mint jelly.
As for Lamb & Mutton, the Greeks know how to make it tasty. American lamb is bland & has that strong odor of lamb. I am sure lamb from UK is just as bad.
My wife, who grew up in England, would like to disagree with you. Lamb is not on the menus of many American eateries, but it's common in the UK. If there is an American restaurant that serves lamb, she'll most likely order it. I hate it, she loves it.