Senior Conservative MPs are urging Prime Minister Rishi Sunak to prioritise childcare reforms, arguing it is too expensive for parents.
Robin Walker, chairman of the Commons education committee, said his party needed "a serious set of policies" on the issue.
A source close to former PM Liz Truss has urged her successor not to scrap her plans to overhaul the system.
No 10 sources have denied Mr Sunak has shelved plans for reform.
The UK is among the most expensive countries for childcare in the world, according to the Organisation for Economic Co-operation and Development.
Ms Truss, a former childcare minister, had made the issue a focus of her short premiership.
