Re Ms Nutty's post:

Union Square is, as far as I know, a reputable company specialising in re-releases of 60s/70s material. I hope they are because I've bought some.

This compilation includes a lot of heavyweights and it would be relatively simple to check whether rights have been properly leased (e.g. a phone call to Neil Wayne re Dransfield).

Good luck if you are turning to sleuthing.