Picocon is the name given to a series of British science fiction conventions run by the Imperial College Science Fiction and Fantasy Society (ICSF).
[1] Taking place on a Saturday (occasionally extended to Sunday), in February or early March in Imperial College's Blackett Building since 1984.
T-shirts and other merchandise related to the convention are typically emblazoned with the Greek letters ΨΦ (psi, phi), which can be read as Sci-Fi.
Roles in organising the convention include the Sofa ("like a chair, only comfier") and the Beanbag.
One line introductions for a Guests of Honour who don't (yet) have a Wikipedia biography page, e.g. linking a creator to a bibliography, filmography or an example book (series), podcast, piece/series of art, etc.