How to use the online alarm clock
Finish what you are doing and leave for Euston when the 9:25 pm alarm sounds, giving yourself a clear cue to meet the Caledonian Sleeper. With 10:00 pm approaching, the alarm can separate the last few tasks at home or work from the moment you need to set off, rather than leaving that decision to repeated clock checks.
Before relying on the alarm for the Caledonian Sleeper, set it early enough to hear a trial signal while you are still nearby. Check that the sound is audible over music, conversation or headphones, and confirm that the volume suits the room. This alarm cannot alert you after the browser stops running or the computer goes to sleep, so it should not be the only safeguard for meeting the train. A separate phone alarm provides a sensible backup for the departure.
Leaving for Euston at this point in the evening means allowing for the journey as it actually runs around 9:25 pm, not the quicker trip you might expect later at night. Check the current route before finishing up, include time for walking through the station, and leave a small margin for a delayed Tube, bus or taxi. That buffer is more useful than planning to arrive exactly as boarding begins.
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 9:25 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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