I'm not certain on that one, Hans. It does seem bizarre though that such sought-after albums as 'Movement' have never been legitimately reissued (I don't think the Japanese have even reissued that one). This in itself tends to indicate underlying contractual issues. Reissues of the whole UK Columbia 'catalogue' have been very patchy and were only temporarily opened up when Universal UK did that 'Impressed Repressed' series to coincide with Gilles Peterson's CDs and the TV series 'Jazz Britannia'. I believe that series producer Tony Higgins gave up when the 'Vol 3' compilation wasn't issued by Universal (they apparently lost interest after the initial media brouha).
Sadly Chuck may be right but I hope this isn't the case ! For a Mosaic big box they could also include a bundle of Shake Keane sessions to increase the size, perhaps? (e.g. his mega-rare Airborne EPs/LPs, 'That's the Noise' on Ace of Clubs, 'New Directions'/David Mack - UK Columbia).