[Sorry, no context because I deleted the original message!]
Huw,
You might be able to find someone else who remembers the system by
joining the Friends Reunited website at
http://www.friendsreunited.co.uk. It's free to sign up, so all you have
to do is associate yourself with Keele University and then post a
message on the message board asking if anyone else remembers the
machine. It costs ?5 a year to be able to email other people, but I
think the message boards are free. There are currently over 90 people
registered for Keele in the 1960s.
- Paul