Yes, those World Of variants are interesting too. I have the bubble perm one in mono - but, interestingly enough (to me at least) - just found out that 'The mono edition of this collection is a fold-down of the stereo tape, and therefore does not contain the true mono mixes available prior and/or since on other releases.' Damn! Another favourite variant attached. A US pressing of even earlier material - from the three Pye singles (including the Lower Third one).