First Minister Mark Drakeford urged people not to “rush to the shops” on Saturday night after announcing lockdown would start at midnight.
Writing on Twitter at around 8.25pm, Mr Drakeford said: “Please don’t rush to the shops tonight. As we move to level four in Wales most shops will have to close but supermarkets will be open and click and collect will be possible.
“The best gift we can give our loved ones this year is a coronavirus-free Christmas.”
Mr Drakeford announced around three hours earlier that Wales would go into lockdown at midnight and follow level four restrictions.
This will see non-essential retail, close contact services, gyms and leisure centres and hospitality close at the end of trading on Saturday.
Stay-at-home restrictions will be in place from midnight.
The First Minister also announced changes to Christmas with two households allowed to meet on Christmas Day only rather than the five-day period between December 23 and 27.
But pictures had already emerged of large queues outside some stores in Wales after Mr Drakeford’s announcement.
A queue of traffic could be seen outside Morfa Retail Park in Swansea and queues also formed outside shops such as Smyths Toys at Capital Retail Park at Leckwith, Cardiff.
Mr Drakeford made the announcement after discussions with representatives from the other UK nations. He then held an emergency meeting with his cabinet on Saturday afternoon about the new strain of coronavirus that is believed to be behind a surge in infections across the UK. You can read his full statement, here.
Boris Johnson also announced changes to restrictions in England. He said some areas in the South East of England will move into Tier 4 and effectively return to the lockdown rules seen in England in November.
The rest of England will see the Christmas “bubble” policy – allowing up to three household to meet up over the holiday period – severely curtailed, applying on Christmas Day only.