China plans to build more coal-fired power plants and has hinted that it will rethink its timetable to slash emissions, in a significant blow to the UK’s ambitions for securing a global agreement on phasing out coal at the Cop26 climate summit in Glasgow.

In a statement after a meeting of Beijing’s National Energy Commission, the Chinese premier, Li Keqiang, stressed the importance of regular energy supply, after swathes of the country were plunged into darkness by rolling blackouts that hit factories and homes.