Some time ago I looked into the origins of My Old Man's a Dustman, the 1960 song by Lonnie Donegan which helped broaden his appeal.
I didn't look hard enough.
Success seemed assured: appearances on the BBC's Saturday Club and billings with Alma Cogan and David Whitfield meant George and Alan [as the duo were called] were on their way.But Klein eventually "had enough of interpreting the transatlantic sound and split from George," so it would seem that What a Crazy World was the result of his disenchantment with playing rock'n'roll at Butlins and country music with George Bellamy- plus a hefty dose of irritation with the charts:
Everything was so Americanised. All the hit records were covers of American songs.