To think this is not OK?

If that was the case then why did you have to clarify anything? You said in your update you kept them
off out of choice, not because of work. In the OP
you said it just wasn’t an option for you to go so that solution wasn’t viable.

That's not what you said though is it. You said the parents of the disabled children are grateful they get to go. That's very different to all parents are grateful you run trips.

Trying make a parent come on a trip so school don't have to provide extra staff isn't acceptable either, schools should ensure they're capable of managing without the disabled child's parents or run a different trip.

It’s a reasonable question

If the 1:1 is part of the EHCP she should have stayed in school to look after him rather than being used as supervision for the whole class on a trip. Her funding will be specific to your child.

If you had to work then how come you were able to keep him off?

I could've written this... except that my son's 1:1 stayed back at school with him and he did some fun things and went in to a Y2 class etc.(They went to a zoo an hour away, he wasn't interested) And.....
Anybody with a child with ASC will understand that it's not just about going on the trip. It's the change of routine, going on a coach, possibly getting stuck in traffic (massive trigger for my son) waiting, queueing, a packed lunch, not knowing what happens next etc...
Your son's 1:1 should have been available for him to stay at school. Its his 1:1.

He could have gone on the trip with 1:1 and you didn't want that. Fair enough but it is an unauthorised absence. Has DC done any other school trips?

Have you read the OP?

The trip wasn’t unsuitable because it was “niche” or “bespoke” thus excluding a child, OP has said: “it was unsuitable partly due to them being such a flight risk but also, they would not have got on the school bus in the first place”.

So what school trip would have been suitable? Nothing that requires bus transport… which every school trip I know of does, but if not and they pick somewhere they can walk to then it’s still unsuitable because he’s a flight risk?

Presumably given there is structured support in place, including a 1-1, the school had assessed and planned for this.

But it is the parent who has made the decision to not let their child go. Obviously parents can make whatever choices they want.
Did you speak to the SENDCO about your concerns? Our SENDCO has actually gone on some trips to support children. Not sure whether you had a proper meeting with them and the teacher to go through the risk assessment and discuss your concerns and for them to put what they would be providing across.

Not really, you said you couldn’t go due to work, now you’ve said you refused to let your child go as they wouldn’t have coped. Did school feel that DC would have coped? I do think they should have been able to just attend school, or have the day off authorised, but I’m not sure they legally did anything wrong.

Bloody hell, OP, I would have hit the roof.

They haven't made anticipatory adjustments when planning an all class trip, they've taken the 1-1, and then punished DC with the attendance sanction.

Worse, these are reception aged children. At this age, there is no need for a school trip to be so bespoke or niche or specialised that a child is excluded.

Notwithstanding the fact that this is possibly illegal - another poster may be able to say - but I would certainly be taking this to the HT immediately.

Dreadful.

Your child has support in place, a 1-1 who was going to go on the trip, and the school were happy for him to go on the trip. You decided not to send him, what would that be if not an unauthorised absence?

All parents are usually grateful that trips are put on. If they aren't then parents complain they don't get to go anywhere! Organising a trip is very stressful!
Though based on posts on MN maybe schools shouldn't bother as people moan about costs so maybe they should scrap them and then the problem is solved!

Lots of parents are more than happy to volunteer to help on trips and many are willing to step in if they know that will make a difference to their child being able to go. It's usually a case of telling parents their help isn't required!

This is one of those can't win situations..school try their best but it's still wrong.

Parents shouldn't have to attend school trips because they have a disabled dc. Nor should they need to feel grateful. Ffs.

Who stayed home with your child? Could that person not have gone on the trip?

So far all children where I work requiring 1:1s have gone on trips. This has sometimes involved taking a parent to facilitate or where we know that it is tricky (this is usually because of a difficult parent than work commitments) then an additional member of staff has also come. Parents are usually very supportive and grateful that their child has been included and that the school check what provision is available (e.g. wheelchair accessible, sensory space/quiet areas, providing social stories).
You should have been provided with a risk assessment to show how they were going to manage the flight risk.

Did they say he couldn't go on the trip? Did they do a risk assessment?