get home bag ideas wanted

[I-K-E]

Right I'm ok with what i need (taking a few idea of Scythe) but I'm thinking about the OH here

she takes the train to work and by the roads it's a 16 mile walk home, she tends to bring work home and the best bit is she is a teacher so anything needs to be school safe as she doesn't lose her job

She can get a locker in the staff room so can store a bag on site if needed

first thoughts are boots or trainers rather than work shoes and a change of clothes relative to the weather.

torch (plus spare batteries)
head torch
cold food for walk home energy gels etc
something to light a fire (lighter)

not sure what else to add off the top of my head

any ideas