How do you get a year 7 DD to wear a coat to school or at least a jumper?

[Threeschools]

I mean it is getting very cold in the mornings now, and apart from providing the damn things how do you make her wear them?? She is still a bit young so I feel responsible, she is going to catch a pneumonia soon.

My yr7 dd wears a big puffy coat and a ridiculous furry trapper hat but she is that unusual creature - a preteen girl who doesn't give a stuff what other kids think of her. If everyone else were wearing coats she'd probably not wear one and freeze just to show she didn't care about following the crowd .