I’ve been here and we had £100 left after outgoings & food. It was tight but we managed with very careful budgeting.
Phones & BT = reduce if you can. Contracts are difficult but be stern with them
Gas & electricity = high for just 2 adults and a baby! Submit Regular meter readings, be careful with your usage and get those direct debits reduced if possible (or at least be careful and get in credit!)
Car insurance = that’s really high!! Another contract you’re stuck in?
Shop in Lidl and Aldi. And don’t waste food. Meal plan and budget. I bet you can get your food bill down!
Sell anything you can on eBay or FAcebook Market Place!! I just sold used magazines for £20 on FB - can’t believe it!! I’ve made £100 on eBay this month by selling clothes I don’t actually wear 
You need to find a job. Even a few hours on a weekend can make ALL the difference. Or go back full time, even if your salary just pays for nursery. The longer your gap on your CV - the harder it’ll be to get back into work.
I found this out the hard way! 
Make lists of all the free things you can do that will bring your family joy….(walk in the woods with a flask of hot choc, walk through town to the see Christmas lights, summer beach BBQ)
It’s a shit time for you. But you’ll be alright!
