18 year old taking 12 year old on 4 trains aibu?

[lilypoppet]

Without asking me,.my DH, Mil and 18 year old daughter have organised for the 18 year old to take my 12 year old daughter to Lincolnshire on their own. We live on West Sussex. This involves a long journey of 4 trains, including underground across London. I must stress DH isn't.going with them and I have not.been asked. I don't even know which station they'll.be picked up from. I have been given no information. They have already bought the tickets. What can I do?

I'd probably let a 16 year old take a 12 year old tbh

Thanks for the ‘handwritten note’ line OP. I needed a good belly laugh. Perfectly bonkers!

I would probably let a 12yo go in their own if I knew they were confident enough. OP you are being ridiculous.