She said: "Mumsnet users have been calling for help with the ever-rising cost of childcare, which is a serious impediment to many mothers returning to work after children, for some time, so we welcome the additional funding going into this scheme.
"However there is concern that single-parent households might lose out whilst some very high earning two-parent households will benefit.
"A couple could earn £300,000 a year and still benefit. That doesn't seem sensible and is inconsistent with other cuts, such as those to child benefit and to childcare tax credit.
More top news
Money raised for a Down Syndrome charity by the mother of a little girl with the condition has been stolen in a suspected burglary.
A second mishap following last year's crash has left the world's largest aircraft with a torn hull.
Sunshine set to return this Sunday