UK Watch: alert states for UK households, from official sources

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Britain's alert states, from official sources, read every half hour by day, hourly overnight Reading the instruments…

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).

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Not an emergency service. In an emergency call 999. For flooding call Floodline 0345 988 1188. For a power cut call 105.