Tesco will be limiting the number of people allowed inside the store at one time starting Thursday, the 9th of April. The only information they provided is that the number of people allowed inside depends on the size of the given store. There will be employees at the entrance checking the number of people entering. Once the limit is reached, people will have to wait outside until someone leaves.
This measure is implemented in order to make sure people have enough space to keep a 2-meter distance.