How to use the online alarm clock
While getting your kit ready for overnight roadworks on the M25, set the alarm for 2:50 am before you need to leave. That gives you a clear prompt to collect your PPE, check the job details and be ready ahead of 3:00 am, without watching the clock while you prepare.
Your departure may happen around vans, equipment or other background noise, so choose a volume that remains noticeable in those surroundings and test it briefly from where you will be getting ready. Keep the sound output unobstructed rather than tucked beneath clothing or paperwork. Because this browser alarm relies on the browser remaining active and the phone staying awake, it may miss your M25 roadworks departure if either stops; use a separate alarm as a backup when being late would affect the shift.
Before leaving at this hour, check the planned M25 route and allow for overnight lane closures, reduced speed limits or a works access point that takes longer to reach than the usual junction. Roads may be quieter at 2:50 am, but that does not guarantee a quicker journey. Build in enough time to park safely, find the correct meeting place and put on your PPE before the crew starts.
Common questions
What happens if my laptop goes to sleep before 2:50 am?
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.
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.
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