I think you need to be very careful here that your dsd is not playing you up. It might very well be that her mum is saying no because she is acting irresponsible rather than because she doesn't want to spend the maintenance money on her daughter.
The repair for the phone, maybe it's the 4th time she's broken it, maybe she doesn't look after it properly, maybe mum said that if she broke it one more time, she'd have to pay for the repair, and that would be the right thing to do to learn the lesson that she needs to look after her things.
The pocket money to go out, maybe mum gives her reasonable pocket money, but she doesn't budget it properly. Maybe she chose to spend it all on a designer outfit that cost £150 and has no money left for the drinks. Again, it would be very reasonable that her mum said no to extra money.
The fact that she doesn't want to even contemplated working does bring into question whether she is playing victim and acting like a princess. Her mum might be dealing with it the right way, but because she wants her way, she is crying to her dad and you, knowing that if she said her mum is refusing to give her anything, you'd go very annoyed.
Ultimately, mum might be fine with some of the money being diverted directly to her, so that she can herself reduce the pocket money she gives her already. It could very well backfire on dsd if indeed, she is being manipulative.