This mid 90s LIFFE promotional video of the Cannon Bridge trading floor is definitely worth a watch. The video is six minutes long and appears to only be on facebook but a facebook account isn't necessary to view it as I don't have one myself. Click here for the link. There's a lot of interesting aspects to the vid and one in particular I'd like to point out starting at 3:38 is the GUI for the APT system, it's always funny to see old technology. Hat tip to long time LIFFE trader Spencer Campbell for pointing it out to me.