"And Now it is so early" was re-released on th Japanese Vinyl label as a cd in 2006. Sold out at present, but may be re-stocked later.

Dunno who holds copyright, but an inquiry to the Copyright Office (costs ?) would answer that.

"Rebellion," Nigel Denver, Decca 1964, has 11 tracks trad. arranged Nigel Denver, 2 credited to McColl and Peggy Seeger, one to Hamish Henderson.
Inquiry to Decca probably would determine who holds copyright.