Peter Banham print lithograph? mushroom magic 1988

Does anyone have any information about this. It has limited edition numbers so would that make it a lithograph. The only artist named Peter Banham I know is the architect/critic and he actually died the same year this print was made in 1988.

 

Pete lived in South-East London. All of his drawings are in the style of this print and his medium was or is coloured pencil. He did his own framing and sold out of Greenwich market and Glastonbury Festival. I've lost contact with him some years ago.