Who is Delia Derbyshire you ask? Well, you're unlikely to know unless you are a Doctor Who or vintage electronica fan. She was a pioneer of the latter and best-known for her work as part of the BBC Radiophonic Workshop, where she produced the famous Doctor Who theme, amongst other things.
This suitably '60s poster is limited to 45 copies, sized at 500mm x 700mm and printed on very high quality 194 gram paper, each one signed by the artist. £22.99 gets you one. See a shot of the poster on a wall over the page.