To be fuming that DH has spent the whole day on his laptop?

You think it’s possible that OP’s husband has been working remotely as a police dispatcher in their home office since 5am? Now THAT is pretty daft and made me laugh.
You seem gullible.

I would go in there - its Xmas day - of
course he can speak to you

There isn't a single job in the world that requires one single person to be working without a break from 5am-9pm on Christmas day. He's not that important that others couldn't have done a few hours in an emergency.

Anyone thinking this is someone simply working is pretty daft.

Is there any backstory OP? Has he got form for doing this type of thing before? Totally unacceptable, on Christmas Day of all days. I smell BS and this is some very crap excuse to swerve involvement in family life.

Sorry you and your kids have had to put up with this OP, I’d be tempted to show him the door.

He has CHOSEN as in made a choice, to opt out of your family Christmas (and I admit that when nuerodiverse dc were small I opted in to work on some days, to get a bit of a break)

Why is he doing this?

Is it hard for him? Is there some emotional challenge (like did his Dad die on Christmas day when he was 4?) Is it difficult for him to be around excited children? None of these are reasons why he should be separate in his office, but they may add context.

How has he been in others years?

And why are you accepting this? Why are you not calling him out of his office?

Unless he is Keir Starmer this is ridiculous

Turn off the internet or the electric from the fuse board

There are plenty of computer based jobs that might require urgent work at odd, long hours, including Christmas Day. You’d have to be pretty daft not to realise that but it seems that is indeed the case for lots of posters. The police example made me laugh - how do people think emergency services know where the emergencies are for them to attend? That’s all academic though - OP, you know what his job is so presumably you know whether it’s plausible that he’d have to work today (which is separate from the fact it’s annoyed you)?

OMFG He's not working, I have family and friends who are addicted to working and even they get a few hours break Christmas day, no job involves 16hrs of continuous work, What's he doing for food and loo?

What is his actual job? What industry?

Not sure we can fully comment without that background…

That being said I consider myself I bit of a workaholic and work with many of them in senior and mid-senior roles in the City. I’ve never known anyone work on Christmas Day, not even the ones that email at 2am or work most weekends.

A woman colleague?

Definitely something fishy going on there op.

Turn the internet off.

Tell him to get his arse out of that office now or he can sleep in there tonight.

Who on earth has voted that you are not being reasonable?? I mean…what the actual fuck???

Unless he’s in a ‘life or death’ type of scenario, with the company/business about to fold without his immediate and full involvement in saving the day, he is being a MASSIVE TWAT!!

Genuinely, hand on heart, I could not get over this. And even if there IS a huge business problem that he had no choice but to work all day on, he has NO RIGHG AT ALL to be such a fucking arsehole, shouting at you and your children!!

Who does he think he is??? ARSEHOLE!

I’d be out.

My husband is a workaholic, works full time and runs several sidelines - he’s always working, or thinking about work, it’s what makes him happy and it’s lucrative. I knew what was getting in to so in just roll with it…. However, he knows when it’s acceptable to be working and when it isn’t, and he’s been fully engaged today - I don’t even think I’ve seen him look at his phone!

I can only imagine the bollocking my DH would getting if he’d behaved like yours today.

Are you sure it’s work he’s doing? I’d be very suspicious

That’s bloody weird and frankly suspicious. I used to work in the most full on job ever (international corporate finance lawyer) none of us worked on Christmas Day!

Of course he's not actually working.

What job does he do that might require him to work Xmas day from home?? He has checked out of family life and is a selfish bastard why are you putting up with this

You sound as though you don't believe he is actually working OP.
What do you think he is doing locked in his office that he is desperate for you not to see?

I assume this isn't the first time he's chosen work over family time? How old are your DC, primary school age?

Go in and say 'do what you like, I'm filing for divorce after this' and then leave. It's ridiculous.

I wouod want an absolutely irrefutable reason like he work in cyber security and Netflix has been hacked or he’s closing a billion dollar deal in a Middle Eastern or Asian country that doesn’t take today as a holiday.
Anything less than that and I’d be seriously considering divorce. I have no time for “fathers” who are absent while present. It’s more damaging and hurtful than just being plain absent.

It’s bullshit. He’s having an affair, gambling, addicted to porn or just absolutely hell bent on not having to endure his family.
I’d unplug the wifi.