I don't know how many of yous bank with Monzo but they're running a 1p challenge.
Someone on their forum created this sheet for how much you'd need to save per month (set aside to make sure you make the end of the challenge)
I'm giving it a go, it seems totally do-able and one that, with some planning, won't be noticed. If anything will help cover bills in Jan/Feb next year when work's dried up.