Ireland are in a different (better) position to the UK. I wouldn't use that comparison as a guide.
Christmas as a business proposition is all about consumer confidence. How can anyone feel confident about doing the High Street ritual (which also means restaurant, bar, cafe visits) in the teeth of a murderous pandemic?
Look at the trend in any case. From last year:
View attachment 106637
Expect the vast majority switching to online this year.
Traditionally up to Sep we had high numbers but generally in the Cities in Ireland mate. Our situation deteriorated to a country wide problem were every single county even rural ones had very high and deteriorating infection rates. In many ways the second wave here was more problematic then the first.
I think shopping is one thing, Christmas lets be honest is a communal affair, the lights, the trees, the food shop, the Xmas party the new gear, i know i get dragged into town for the "atmosphere". Cant see the UK government side stepping that for the economy in all good faith. Bad political collateral to, who want to be the politician to cancel Xmas.