How to use the online alarm clock
Waiting to meet the Caledonian Sleeper at Euston, you can set this 10:10 pm alarm and keep watching the time without repeatedly checking the clock. It gives you a clear marker before the train is due, whether you are already near the concourse or allowing for a final Tube connection. With 11:00 pm approaching, you still have 50 minutes to confirm the platform information and choose a sensible meeting point.
For this Euston meeting, the alert needs to be audible above station announcements and late-evening crowds. Check that silent mode is off, raise the media volume, and use the alarm’s test sound if one is available. Keep the browser running in the foreground while you wait. The Caledonian Sleeper could arrive without an alert if this page has been closed or your phone has gone to sleep, so retain the train time separately as a fallback.
On a late-evening wait at 10:10 pm, bright surroundings can make a phone screen uncomfortable to glance at, while a dim corner may hide useful signs. Before settling near the meeting point, lower the screen brightness or switch to a warmer display setting, then position yourself where the departure boards remain readable. That leaves the lighting arranged before 11:00 pm rather than becoming another distraction when passengers begin moving towards the platform.
Common questions
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.
Does the alarm still work if I close the tab?
No. Everything runs inside this page, so closing the tab — or quitting the browser altogether — ends the countdown there and then. Leaving it open in the background is all it asks, and switching to another tab makes no difference.
What happens if my laptop goes to sleep before 10:10 pm?
The tab sleeps along with it and the alarm will not sound on time, if at all. If you are relying on it, change the power settings so the machine stays awake, or keep a phone alarm running as well.
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