Thanks FF. I think the key bits are:
Making sure each person has their ticket on their phone via the app.
Kids can have their ticket on an adult's/parent's phone - although it does not say that on the video. Hmmmmm.
You cannot bring a bag - although the app says an A4 sized bag or smaller. Hmmmmm!
Yep, there is a little bit of confusion but hopefully common sense will prevail.