We're a family of six (+ dog and cat). That's the bare bones of how much we spend on a monthly basis, but beyond cheaper phone contracts and maybe DH finding a job with a shorter commute, I don't think it can be much lower? (We own two cars BTW).
£1150 - mortgage
£500 - groceries
£150 - energy
£400 - commuting / diesel
£270 - council tax + water
£50 - road tax
£100 - pet related
£130 - phones / internet / subscriptions
£100 - medical
£200 - DCs savings