Throughout. It's revealed some cases of neglect and abuse. The end of term ones are the most critical, as that's when some of the most serious incidences kick off - like taking children overseas for assorted reasons including FGM, forced marriage, hiding the evidence of an assault - or just the helpful neighbour saying 'they've gone back to...' or 'there was a huge row, banging and screaming on Sunday night and I've not seen them since'.
If they're at home because parents don't see school as a priority, they're struggling to meet SEND (and six weeks without a break can be a huge strain with the break in routine, less money, disruption to routine, etc, increasing the risk of parents or children being hurt), dealing with parental addictions or mental illness coming first with no relief provided by the school giving a free breakfast, snacks and school dinners, or because they're already at breaking point, seeing the kid for that last check can be even more vital, because it's the last chance before September. And unfortunately, because so many kids are neglected, abused, left hungry or treated absolutely appallingly when there's nobody to see the bruises or hear the disclosures, the sheer volume of work involved and new incidents over the weekend or even just the day or morning before means that an absence could stop the planned checks on welfare and safety going ahead.
I'm guessing that you've also never seen a much thinner than in July kid turning up in September and being very glad of the longer life stuff that's included in the parcels because there hasn't been enough food for the last six weeks to stop them going hungry. Would have been better going to them in July in my opinion.
I mean, I was broadly supportive of the 'ugh, I wish I didn't have to get up but I'm going to have to now there's the best part of two hundred quid waiting for me'. It's crap functioning on four hours' kip a night at best I do it for work and then snap awake at usual time at the weekends and it's been 35 whole days since half term ended and there was a bit of a break where most people weren't still in school.
But when it comes down to it, there's always going to be somebody who thinks what's done isn't good enough for them/isn't enough/is too much/is too intrusive. Can't please all the people all of the time. Even when they're getting two hundred notes out of it.