The new system for setting Covid restrictions in Scotland adds two levels to the three tiers used in England.
"We all hope to be in a position" to allow families to spend Christmas together, a government minister says.
The highest levels continue to be in the north of England, says the Office for National Statistics
Authors say no child must go hungry this winter, amid continuing row over free school meals.
Pubs, restaurants and non-essential shops will shut when the 17-day lockdown starts at 18:00 BST.