How to use the online alarm clock
If you’re handing the King’s Cross train collection to someone else at 12:19 pm, set the alarm for the moment they need to take over and pass along the platform, arrival time and carriage details now. That leaves the handover settled well before 1:00 pm, without relying on a hurried message while they are crossing the station.
Because the King’s Cross handover depends on a timely alert, keep this page open after setting 12:19 pm and check that sound is audible. Closing the page or browser, or allowing the phone to sleep, can prevent the alarm sounding for the train. If another person is taking responsibility, tell them the agreed time as well, so the browser alert supports the arrangement rather than being its only safeguard.
A midday wait at King’s Cross can feel warm after a brisk walk with luggage, while strong air conditioning inside the concourse may feel noticeably cooler. Choose a meeting point away from a direct cold draught, and keep a light layer accessible rather than buried in a case. If the platform is announced near departure, the remaining walk may include warmer passages and crowded escalators, so having water and the ticket ready makes the change of temperature less distracting.
Common questions
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 12:19 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.
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.
Cookie policy