United KingdomOne tap, one device, all day
London's transport runs on contactless pay-as-you-go. The same bank card or phone wallet that buys a coffee opens the gate on the Underground, pays for the bus and covers most rail journeys inside the city, with the day's total capped however often you ride. It expects one thing in return: the same card or device every time. Touch in with your phone and out with your watch, or with the plastic card behind it, and the network sees two strangers — two incomplete journeys, neither counting towards the cap. Present the handset, not your whole wallet: a reader that finds two contactless cards at once can charge the one you did not intend. On the Tube and the railway you touch out as well as in; forget, and you are billed a maximum fare. On a bus you touch in only, and the driver will not take cash.
Weekends belong to the engineers
Britain's railway does much of its repair work while commuters are at home, which means Saturdays, Sundays and bank holidays. A line that ran perfectly on Friday can be shut between two towns by Sunday, with a replacement coach idling outside the station and an hour added to the trip. Those closures are published weeks ahead, yet they rarely make it into an itinerary drawn up at home. Weekday trouble is unplanned — a signal failure, a train that simply never arrives — and news of it comes in instalments: a revised time, then a cancellation, then word that tickets are being accepted on another operator's route. That last update can save you a second fare, and it is posted live, never printed.
The platform goes up when the train is ready
At the big London termini a departure can sit on the board for a long while with no platform number beside it. The number appears a few minutes before boarding, the whole hall turns at once, and anyone who drifted off for a sandwich is suddenly walking briskly. Cheap advance tickets tie you to one particular train, so the difference between a service that was cancelled and one you merely missed is worth real money. Knowing which, while it is happening, is the job of live running information.
Below street level, do things in order
A deep Tube tunnel is a poor place to discover you need directions. Signal below ground is not something to count on everywhere, and by the time a page loads the doors have closed. So check the line status and your route before descending, and keep the address you are heading for somewhere that does not need a connection to open. The ride asks nothing of the phone — the tap at the gate does not depend on signal. It is the way out that deserves thought: big stations have several exits, sometimes a long walk apart, and the right one is far easier to choose with the map already on screen.
