Roger Bailey was released on Audio Forty (Arts sister label) and pressed around the same time. this is most probably how the mistake occurred) Roger Bailey is rarer than Incredibles but not as good. I used to collect the labels and oddities like this but don't really any more.
RB used be valued at around the £50 mark, I don't think you'd get that now.
Hi Sean,
Adam's copy was Levines old copy, he told me the story of how he ended up with it, but it was a long time ago! Searling also had it same time as Ian but, only on Fairmount!