“If there’s a queue, please come to the front with your valid ID. Check store details for new priority hours for vulnerable and elderly customers,” said Tesco.

Tesco is urging customers to buy only what they need at this time.

However, the grocery behemoth says it has “good stock levels.

It are also encouraging shoppers to buy in-store rather than online.

“This helps to free up online slots for more vulnerable customers,” said Tesco.