Douglas Adams (holding The Hitchhiker’s Guide to the Galaxy double LP) is on the left; Nick Landau (co-founder of the original Forbidden Planet and Titan Books, holding the just published Hitchhiker’s novel) is right. All comics 12p!
Forbidden Planet was one of London’s first comic book specialty shops, after Dark They Were, and Golden-Eyed and Weird Fantasy.
I found the photo at the Collectors Society forums. It was taken by Colin Davey.
2 Warps to Neptune 
Douglas Adams is my favorite author! Thank you so much for posting this!