I know things are better nowadays, but still find it disheartening that two parents in FT work will only get the "tax-free" childcare help (around 20%). Our take-home pay is around £2k after commuting costs, £1k go to housing and utility bills (CT, energy, and broadband) and then 800 go to childcare even after that 20% off. Leaving us with £200 to feed ourselves, unexpected bills, road tax, insurance, etc..
Our basic UC is 750 +650 of childcare. Our deduction is £1350 so we're still better off with tax free childcare. As this is unsustainable, DH will have to go part time. A bit unfortunate given we don't want to rely on the system, but it's what works out best for our family. We'd both like to work FYT but because childcare is too expensive we can't afford to work as much as we'd like.
Personally I think universal childcare is the answer.