I wouldnt like to try too hard to separate the two, especially given the time of year. But I think the current UK situation does require us to at least dig down to level of data where we can see which age groups have been causing the case numbers to rise recently. Which so far tends to reveal a picture where they still have a bit of wiggle room/time to drag their feels, especially as booster jabs seem to have had an impact in the older groups that have received them so far. I suppose there are some circumstanes where local restrictions are possible but I tend to think national ones are more likely to be appropriate.
And Johnsons government probably did learn some lessons about the political consequences of not responding at all appropriately to Delta, at least as far as travel restriction timing went.
Plus frankly Omicron has potential to really fuck things up badly. I think a huge chunk of the dramatic response seen today is just down to that, how this variant looks on paper and in terms of its growth in South Africa. In those ways it looks very bad indeed and I'll be somewhat surprised and grateful if we even partially dodge any of those bullets with this variant.