You want a monzo account each, if you all get one they have a good system for splitting bills, you can more or less set a group and transfer money amongst each other.
It's brilliant for abroad aswell, and no I don't work for them, I just have one and the rest of the family and I have to say it's a brilliant account and the best banking app IMO.
https://join.monzo.com/r/ij68yct