The Celtic Music issue has been gone into many times on here, but for those who are not aware of the story this is nothing to do with the licensing issues which Gargoyle posted about. Very briefly:

Bill Leader recorded many of the most important British albums of the 1970s, as well has having an important catalogue of recordings of traditional singers and musicians. When Leader Records when bust its entire catalogue found its way into the hand of Celtic Music, run by Dave Bulmer (now deceased) and Neil Sharpley.

For more than 30 years Celtic Music have done virtually nothing to promote the albums whose copyright they own. If you knew that an album you wanted was now owned by Celtic Music, and if you knew how to contact them (none of this easy to find pre-internet), you could order a CD from them, which I have been informed would be burned to order onto CD-ROM and obviously was of poorer quality than a properly produced CD. They have been assiduous in protecting their copyright, and successfully sued over a re-release of Lal Waterson's 'Bright Phoebus', but have done little with it themselves.

This obviously has financial implications for the musicians, especially those like Dick and Nic Jones who are no longer able to perform. The wider artistic loss, since so many albums are effectively unavailable to the public, is also significant.