How to use the online alarm clock
Break away from what you are doing at 8:02 pm to check the timetable for overnight engineering works on the Underground. That leaves the rest of the evening before 9:00 pm to confirm the affected lines, first and last trains, and any replacement buses you may need. A timely reminder keeps the check separate from the task currently holding your attention.
Engineering information can be easy to overlook when the room is filled with television, music or conversation, so set the alarm volume high enough to stand out from that background noise. Keep this page active and the phone or computer awake: otherwise the alarm will not sound, and your timetable check may be missed. A short test signal can show whether the chosen level is clearly audible where you are sitting.
Once the overnight travel details are noted, evening food and drink can fit around any journey changes. If you may need to leave earlier than expected, have a light meal before 8:02 pm or prepare something simple for afterwards. Save a large meal or another caffeinated drink until you know whether the revised Underground route involves a longer walk, a bus connection or extra waiting outside.
Common questions
Do I need an account or an app?
Neither. Choose a time and a sound, press Start, and it runs in this browser tab. Nothing is downloaded, nothing is registered, and closing the page leaves nothing behind on the device.
Can I change the sound?
Yes, there is a short list of tones to pick from before you press Start. Softer sounds are easy to sleep through, so a firmer bell tends to be the safer choice for anything early in the morning.
Will it still be right when the clocks change?
Yes. It reads your device's local clock, so the move between GMT and BST at the end of March and October is picked up automatically, as long as the computer's date, time and time zone are set correctly.
Can I use this on a phone?
It works in a mobile browser, but phones lock the screen and suspend background tabs far more readily than a laptop does, which can stop the alarm sounding. For anything important, a desktop or a plugged-in laptop is the steadier option.
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