Novacon is the UK's longest-established regional science fiction convention, held every autumn since 1971. It's built around a single-stream programme mixing both literary items and more informal events, with deliberate emphasis on social contact between sf fans and genre professionals.
Novacon follows a long tradition of SF conventions held in the UK since the late 1930s. Back in those days it was a proud and lonely thing to be an SF fan and the main source of their interest was the written word.
So at Novacon you probably won't find people dressed up as a Dalek or Darth Vader but you will find: