[1] Pickersgill's love of science fiction led him into UK fandom where he has been involved in both fan-writing and convention-running.
[1] His fanzines include Fouler, Ritblat, Stop Breaking Down, and Rastus Johnson's Cakewalk.
[2] He created the Memory Hole [3](a combined permanent fanzine collection and redistribution system), the former Memory Hole internet forum (for discussing reading, collecting and archiving science fiction fanzines) and helped set up The Mexicon Hat[4] (a charitable fund to assist projects related to British fandom; beneficiaries included the journal Critical Wave).
A collection of Pickersgill's writing for fanzines, Can't Get Off the Island,[5] was published to coincide with his fan guest-of-honour appearance at the 2005 World Science Fiction Convention, Interaction.
Between 2012 and 2013 Pickersgill co-edited, with David Langford, a set of three volumes of Algis Budrys's review columns from The Magazine of Fantasy and Science Fiction covering the period 1975-1993.