Tesco is so desperate for drivers that they're offering £1000 to any driver who'll join their workforce:
https://www.bbc.co.uk/news/business-57983698
With a national shortage of around 100,000 lorry drivers (because many East European drivers decided to leave the country after Brexit and because of Covid-related problems, such as 30,000 HGV driving test appointments being lost last year ), shortages in supermarkets are going to be occurring for quite a while yet.