Official sources, plus machine-read news clearly marked, read every half hour by day and hourly overnight.
Calm is never a default: a lane says calm only when its sources are cleared, were read on time, and show nothing above the bar.
Elevated or severe needs an official graded warning or two independent sources.
Map tiles © Stadia Maps / © Esri. Postcode lookup by postcodes.io on ONS and Ordnance Survey open data (Open Government Licence).
© 2026 NoFooly Ltd, Folkestone, Kent · company number 17438330 · Information only: always follow official advice.