Met office have just issued this ;
Cold Weather Alert
Key:Region not includedWinter preparedness and long-term planningAlert and readinessSevere weather actionNational Emergency
Current alert level: Level 3 - Cold Weather Action
Issued at: 0810 on Wed 5 Dec 2012
There is an 90% probability of severe cold weather between 1800 on Tuesday and 0500 on Sunday in parts of England. This weather could increase the health risks to vulnerable patients and disrupt the delivery of services. Please refer to the national Cold Weather Plan and your Trust's emergency plan for appropriate preventive action.
It will be cold or rather cold in most areas over the next few days and into the weekend with overnight frosts and a risk of icy patches. Wintry showers, feeding into eastern and northeastern through today, will lead to some snow accumulations in places. Wednesday night will be particularly cold with a widespread, sharp frost. During Thursday a weather system will move southeast across all areas bringing wet and windy conditions for a time. Rain is also likely to preceded by snow for a time over hills and down to low levels in the east and northeast. This system will clear early on Friday to allow cold air to spread back over the country with further overnight frosts over the weekend.
An update will be issued when the alert level changes in any region
Level 1
Level 2
Level 3
Level 4
Threshold
values
Regional
risk values
Amber — Severe weather action
Triggered by the Met Office when we are experiencing weather which breaches any of the three thresholds. This stage requires social and healthcare services to target specific actions at high-risk groups.
Advice: Prolonged periods of cold weather can be dangerous, especially for the very young, very old or those with chronic diseases.
If you want more information about how cold weather can affect your health please visit www.nhs.uk. If you are concerned about your health or somebody you care for, please contact NHS Direct on 0845 4647, www.nhsdirect.nhs.uk or your local pharmacist.