There are many ways by which we will all feel we are moving on from lockdown.

Shops, cafes and pubs opening will probably be the most obvious, but for families with children, the nurseries and schools going back will be up there as the big moment.

We have never been in this situation before, where nurseries and schools have been closed for three months. I hope we are never here again, ever.

Closing nurseries and schools was “easy”. Opening them will be more difficult, and opening them will just be the start.

How do you organise social distancing amongst children who simply want to play with their pals again? How do you teach all of the children while only having the space for half because of social distancing but with the same number of teachers?

The answer of course is by only having half in the school at any one time. But where do they go for the rest of the time and what happens to parents who have gone back to work? So much of what we do is geared around the fact that from Monday to Friday, our children are in school from 9am till 3pm.

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Some will, of course, be able to go home – after all, not all parents work. But there will be many families who will need support so we will need to see a huge expansion of child care provision to look after young people during the other half of the week. Think of it as a huge expansion of after school clubs.

But not, of course, in actual schools, as that would defeat the purpose of reducing the number of children in school buildings. So other buildings are going to have to be brought into use, from community centres and leisure centres to church halls.

All of this is going to be a huge exercise, but the biggest challenge of all is going to be what kind of education our young people get, given that they will only be in school for half of the week.

We know how real the attainment gap is, and we know that the home environment is a big issue in that attainment gap. Logic says that it can only get worse where young people are in school for less time. Bridging that attainment gap is going to get harder.

So doing the calculations about social distancing, working out the mechanics of schools running at half capacity and children being in school for half the week is actually the easy bit. Making sure that the progress we have made in bridging the attainment gap over recent years is not lost is the really big challenge.

So watch this space. That challenge starts all over again in August.