@CiderJolly you don’t know that they’ve been dangling the leave at all.
They might have been - they might be utter shits.
But they also might have said, “we’ll do everything we can, but it’s the first week of school summer hols, other people have been booked off for far longer than your month’s notice. We’ll need to get agency, and both our own work and agency availability is totally unprecedented because of Covid.”
They then might have done everything they can - but not been able to get the cover needed. It’s not that last minute... it’s a full working week of notice that they can’t do it. A week’s notice is shit for an approved holiday. It’s not shit if he was told they couldn’t approve it, but would if they could. It all depends on the communication.
Certainly, it was unwise to book work on the house for an unapproved leave request, if it’s that critical that he is present. Although as a PP, OP didn’t respond to questions about what the issue was - presence or sleep of something else.
I’ve worked nights in a warehouse - and transport office. It’s really really hard, how the nights catch up with you. I’m not surprised yes suffering, and I feel for him. But I don’t have the sane certainty that his employer is taking the piss. Even the shunting work unpaid... I’m salaried. Sometimes, that means unpaid hours to get the job done. I work for a great company. Yes, I’ve worked unpaid until midnight when there’s been an issue - but no-one minds me taking 2 hours off paid to nip up to school sports day. That’s why I suggested OP look at the history with the company.
At this point, her husband hasn’t even queried it 🤷🏻♀️ For all we know, if he calls his manager today she says, “I’m struggling here, I need this break” then they’ll sort it.