I'd like to bet that that Dave Bulmer never knew the session tapes were with the library. It rather looks as though only Bill Leader and maybe those very close to him knew that.

There's money to be made out of some of those albums, but not, I suspect, most of them. Small runs of CDs have never been more economically viable though.

Boxed sets and track compilations from the whole catalogue would be the way to shift the stuff which wouldn't be worth doing on its own. I don't like that idea, but that would be the way to make the most money.