Britain’s ambition to renew its aging fleet of nuclear power plants is losing momentum after the government offered few new details on how it will support additional projects.

Prime Minister Boris Johnson’s administration set aside £500 million ($661 million) for small modular reactor projects but was silent on support for traditional large-scale plants. The issue gained urgency on Thursday as Electricite de France SA’s announced the closure of its Hinkley Point B reactors two years early.

The government’s latest thinking on how to replace its aging fleet of nuclear plants marks a dramatic shift from 2013, when David Cameron agreed to funding for new reactors at the Hinkley Point site with support from China. Since then, relations with China have deteriorated, electricity demand slumped and renewables such as wind and solar farms became much cheaper than new atomic plants.