An old 1969 poster on sale on ebay at £ 149.99... The gig was played in Brighton at The Dome.
Here's the seller's description:
Britains five-piece acoustic supergroup described as "The Folk Beatles"
at the Brighton Dome May 26th 1969
presented by Blackhill Enterprises (Blackhill was a rock music management company founded as a partnership by the four original members of Pink Floyd and promoted the first free live concerts in England)
orig Gig Poster designed by Derek Thomas
15" X 19" in heavy Gloss Deep Purples, Pinks, Red & Green Graphics and Embossed Pentangle super sheen finish
finish still bright Good Colours pin holes & creases in all corners otherwise good cond
no©2020 Luca Chino Ferrari (unless you intend to make a profit. In which case, ask first)