Button Moon (British children's series, 70s/80s)

[daivel]

Any chance anybody recognises this typeface, presumably created in the late 70s? Some interesting inconsistencies (eg. the lower case u and the differently shaped highlights in the bubble/balloon style). I get the impression it's no longer available, as this was used extensively during the original run, but doesn't appear on any recent official/licenced products, even the logo of the charity. Apologies for the image quality (all photos from eBay, etc.). Any ideas would be much appreciated.