Upfront - there will be people who have no wriggle room. High mortgage and childcare prices hit one demographic particularly hard.
but many do have room but don’t always want to make the changes
Water bill - we use two or three times the amount of water on average per household than in Spain so that’s something that can be tackled. See threads about having a bath and then a shower the next morning, not being able to shower in under 5 minutes, daily or more frequent showers , washing clothes after one wear , if it’s yellow let it mellow ?
food bills - go vegetarian - it’s the easiest way to eat healthy and cheap
I know people on UC who are getting hair dos and new this that and other - and then moan at me about not being able to afford something else. So people do prioritise differently- and when it comes to a child’s health I think keeping their air warm should be at the top of the list with critical bills
control your bills by turning off the gadgets , the telly, the coffee machine , the games console , not the heating , use less hot water , hanging a spare duvet over the window