All I know is that Amazon Prime is delivering everything I order the next day, in fact even just hours after I placed the order.
I have used Screwfix a lot recently, ordering and paying on-line and picking up the goods within the hour at most, with great friendly Customer Service and no close contact with a human.
I bought a Mira shower on line, and it was delivered within two days.
At Sainsbury's it is rare to face queues now, and if I do it is only 10 or so people long, going in via a one way system. Inside social distancing is working well, buty I use Smart Shop, scanning all my purchases as I go, loading the trolley, then entering all via the scanner, paying with a card, and never coming into contact with another human.
In Boots you walk in via a one way entrance, place your product in a basket, then pay at a protected checkout with a card.
I buy my fuel at Sainsbury's, at a pump where you pay by card, get a receipt, and go without, yet again, any human contact.
So, I am not certainly not encountering any problems.
PS I forgot Littlewoods who deliver next day via Yodel