Yeah it’s all kinda weird that they have this, but no other screenings are planned.
Not weird. The British Film Institute have an archive containing huge numbers of films. It’s their job to preserve those for the nation and for humanity as carefully as possible.
But films are precious fragile physical artefacts. So they have to balance the need to screen the films for the public from time to time, since films are of course meant to be seen, with the need to keep them locked away safely away from harm. I saw a nitrate print of a 1929 movie on the weekend, and they mentioned that it might be the last time that that print will be screened for the public.
Their copy of Star Wars is one of those archived films. They’re not going to play that copy continuously. 😃