> And this is far from straight forward everywhere. E.g. Waterloo & City at Waterloo and its lack of barriers Lack of barriers is to prevent overcrowding, and

> And this is far from straight forward everywhere. E.g. Waterloo & City at Waterloo and its lack of barriers Lack of barriers is to prevent overcrowding, and maximise passenger flow at one of the busiest stations in London. If you use that link regularly, then you don’t actually need to tap out at all. The contactless system will spot the missing tap-out, and automatically add a virtual tap-out for you at the end of the day. > But not the physical UX Including the physical UX. Lack of barriers is the exception, not the rule. If the physical UX wasn’t designed to prevent overcharging, then TfL wouldn’t bother installing so many purple interchange readers around the system, and keep reminding people to use them. The only purpose of those readers is to allow people to get a lower fair by demonstrating they’ve avoided zone 1.