It seems to be the same chap... article here mentions him as a folk singer:

"Up and down Britain, meanwhile, campaigners such as Nalder, 63, are doing their bit. In 1993, the former maths lecturer and folk singer turned ecologist set up South Court Environmental – a cooperative that tries to involve the local community in wildlife conservation. A revived orchard, open to the public and run by volunteers, would have been perfect"