From Ian Watson:
I mention for the public benefit that Eastercon have just announced they will accept no more memberships of Olympus, including walk-in day memberships. So if you were thinking off popping up to Heathrow for a day, it appears this is now impossible. Please copy this onwards because people who haven’t already joined mightn’t become aware of this.
This refers to the National British SF Convention, taking place over the coming Easter weekend.