Sometimes I think it's hard for teenagers to work out what's acceptable and what's not. I think the train thing is probably just an example of her not seeing things from your point of view rather than deliberately rebelling. She probably thought, "mum lets me go on a train on my own; she's happy to take DS on the train so what's the difference between him being on a train with mum than with me?" Though as you know Bath, in this house we all love trains so I'm probably less worried about a teen and child travelling alone than most people. But the thing is she changed plans without checking with you which is totally not on so that's the point I would make to her.

You have much more patience that I would have re having lots of friends over. I get irritable when I get home from work and DSD has a friend or two over. I just want to chill, not make small talk about whether Supre is a good shop! Definitely try to restrict it to a few days a week for your own sanity and budget!

As far as punishments go, the best one we have is confiscation of the phone. DSD can't live without it. She's not fussed really about pocket money being withheld or computer privileges being taken away but her world ends if she's without a phone.

Good luck!