Contagion is the key consideration. Assume that if you stay in a room with someone currently suffering Covid for 15 minutes or more, you catch it. Let's say each Covid death costs the nation on average £5 millions (=£400 billions/80,000 casualties), you can see eat out to help out at £10 a head is clearly stupid and shortsighted.We do need to know exactly why UK has done so badly
The same reasoning applies to Christmas shopping. Southend has a new Primark in the High Street that opened just after the second lockdown was lifted. I saw the queue of people at the door - that's your explanation.