Wondering what others would do in this situation

person B comes across as very interfering, they shouldn’t have nebbed in. Person A shouldn’t have shouted though. But none of this would have happened if person B hadn’t have taken it upon themselves to make decisions for everyone.

Eh?

Not your child, not your decision to make.

You do you, you leave everyone else to make their own decisions on their own children.

That still doesnt give anyone the right to yell at someone else.

Urgh. Person B is a nosey parker and possibly power tripping on this.

You're the problem OP. It's unfortunate you can't see it. And if you have said you would do the same again, what was the point in starting a thread asking what others would do? As it is obvious you thought you were right and you still think you're right, so it's a pointless thread

But you didn't even know what the child was poorly with. It might not have been something contagious. You just flexed your bit of power and got the child banned from the trip and potentially from the club now.

And that was the problem because it’s all was hearsay. Don’t make assumptions on behalf of other people. Maybe child just had a bit of cold and mum deliberately left them at home to recover for the trip. Maybe child had periods and 2 first days are tricky to manage but the 3d one is ok. Maybe child had anxiety attack or toothache.
If you were unsure about the trip attendance you should have asked parents in your official capacity: Hi Helen, im checking last things for the trip on Saturday and heard that little Louisa was out of school today and yesterday. Can you confirm if she’s still going onto the trip?
I think mum was wrong to shout but maybe something going on and she was stressed and your interference didn’t help at all. Yes you have policy about illnesses but I bet you have policy about exclusion child from an activity on the base of someone’s assumptions ax well.

Disclaimer: my child doesn't go to school and activities if unwell. The rule is that if she is not in school today - no other activities as well (e.g club or cinema) However it doesn’t mean no activities this week/months. It’s possible to be out of school on Friday but in a drama club on Saturday.

Person B assumed person A's DC would not be attending as they hadn't been at school and said as much to person A.

What do you mean you "said as much to person A"? Said what? How did it come up?

Are you saying that you crossed them off from the trip and then informed person A they were no longer invited because you assumed they were ill.. in which case her shouting isn't acceptable but I'd be annoyed if you made assumptions and decisions about my child's attendance without even bothering to ask me.

I think the TLDR is that you crossed her child off the list based on an assumption, and she was so mad about it she rang you up to shout and then rang the leader up to shout?

Given B has a clear anti-A agenda... I'm doubting the veracity of As shouting.
Is it a competitive club where your and As child are against each other? 🤔

person B caused the whole drama.

None of this would have happened if it wasn't for B. B (you) should have kept your nose out of it. Shit stirring and causing trouble to the extreme. Yes, A shouldn't have shouted and screamed, but she lost her cool, because of your intolerable behaviour

The problem here is you made assumptions.

The child's parent never told you they were too ill to attend or told you the reason they were off school.

You decided to take action on the basis of limited information.

This is your issue but you don't seem to realise that.

She's perfectly at liberty to "change her story"! Who do you think you are? Special Branch? You used information about her that you gained from being a fellow school mum, nothing to do with your volunteering role. You shared information about her child's health with a third party. You massively overstepped and have caused this drama.

This makes things a million times worse, on you.

How on earth did you figure that they would make the other 40 kids ill then?
Could have been a head ache!

You were an interfering busy body and have caused a huge fuss

Whenever I see an ABC story I auto-change to Annie Becky Carrie or Andrew Bob Carl, its just too hard to follow otherwise.

Back to OPs post-B was nosy, pushy and meddling. The kids may have been out of school for reasons other than communicable illness and Annies changing explanation could’ve been her not wanting to share a private situation.

Theoretically Becky might have been concerned re the health of the entire group esp as its Dec and nobody wants illness in the house at the busy holiday.

However Becky didn’t know and pushed and prodded and imo the best thing to have done is flag it with Carrie and let her investigate if she felt necessary. OP sounds like she’s enjoying the whole mess she created.

Or maybe they kept the children off for some other reason and illness was a white lie? They our story is hard to follow, but if you are involved in running this club (not clear?) and A is abusive ban them. If you’re not a volunteer of running club stop interfering

You're person B? No shit