If not what do I do with her?
She doesn't want to go because she is worried she will get lost. Now we all know that this is impossible. The school would never leave without her. She is also worried she will be sick in front of all her school friends as she suffers badly from travel sickness. She can be sick on the way to the supermarket it is that bad. Travel sickness pills work brilliantly for her 90% of the time she is not sick after taking them, but still often feels nauseous.
Her whole year group is going so the school have basically told me to keep her off if she won't go because there will be no one there to teach her. She would have to join another year groups class which would be difficult for her and the teacher/ta. It would go down as an unauthorised absence because she is not ill, even though they have asked me to keep her home. Her attendance is being monitored because she had a lot of illness/medical appointments last year.