McGrath of Harlow
You're right about it once working the other way. In the early fifties, when many of the big names in "pop" were American, the MU over here had this "head for head" policy. This led to examples like Johnny Cash coming to the UK without The Tennessee Two (and being ably accompanied by Joe Brown on "Oh Boy" on TV).
Then there was the Merseybeat explosion and the MU changed there tune. (Metaphor Alert!)

Eddie