Monday could be the coldest November night in almost 25 years as temperatures plummet towards ?8C.
In rural areas, temperatures will drop below ?6C (21.2F), while towns and cities ? including London ? may see the mercury dip to ?3C, with the south bearing the brunt of it.
The last time it reached ?8C in autumn was on November 22 1993.
Sophie Yeomans, from the Met Office, said: ?It?s going to be fairly cold for the next few days ? It will be colder down south than up in Scotland on Monday and Tuesday due to the clear skies.?
Ladbrokes is offering odds of 2/1 for snow in Aberdeen, Edinburgh and Glasgow; in England, Wales and Northern Ireland, it is offering odds of 3/1 for snow in Newcastle upon Tyne and Belfast.
It is offering odds of 4/1 for London and 5/1 for Liverpool and Manchester.
the BIG freeze will be next

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