Prior to the e-gates at UK airports and their being made available to passport holders from countries other than the UK and EU/EEA, travelers from Canada, the U.S., etc. had to line up in the main immigration queue which was slow as molasses. Meanwhile, the UK/European lanes were zipping along. Even when the queues there emptied out, UKBF officers preferred to sit and stare off into space instead of directing some travelers from the ROW line to their windows to help clear the backlog.