Here's a list of who's been affected and their latest published advice.

Which police forces have shared the alert?

• Metropolitan Police
• South Wales Police
• Greater Manchester Police
• West Midlands Police
• West Yorkshire Police
• Kent Police
• Derbyshire Police
• Cumbria Police
• Bedfordshire Police
• Essex Police
• Northamptonshire Police
• Gwent Police
• Devon and Cornwall Police
• Avon and Somerset Police
• Police Service Northern Ireland (PSNI)

Which fire and rescue services have shared the alert?

• South Wales Fire and Rescue - call 101 if 999 does not work
• North Wales Fire and Rescue - now resolved
• West Midlands Fire and Rescue - now resolved
• Devon and Somerset Fire and Rescue
• Gloucestershire Fire and Rescue
• Scottish Fire and Rescue
• Dorset and Wiltshire Fire and Rescue
• South Yorkshire Fire and Rescue - call 0114 2727202 if 999 does not work
• London Fire Brigade - call 101 or 111 if 999 does not work
• Cleveland Fire Brigade - now resolved
• Lancashire Fire and Rescue - now resolved
• Hampshire & Isle of Wight Fire and Rescue - now resolved
• North Yorkshire Fire and Rescue - now resolved
• Kent Fire and Rescue - call 101 if 999 does not work
• Herts Fire and Rescue - now resolved
• Greater Manchester Fire and Rescue - call 01925713161 or 01925460821 if you can't get through
• Cheshire Fire and Rescue - now resolved
• Cumbria Fire and Rescue - call 01925 713163 or 01925 460823
• West Yorkshire Fire and Rescue - now resolved
• Warwickshire Fire and Rescue - now resolved
• Norfolk Fire and Rescue - call 101 if 999 does not work
• East Sussex Fire and Rescue - call 01737 499006
• Surrey Fire and Rescue - call 01737 499050
• Bedfordshire Fire and Rescue - nor resolved but with reduced capacity
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Which ambulance services have shared the alert?

• London Ambulance Service - call 111
• North West Ambulance Service
• West Midlands Ambulance Service
• East England Ambulance Service