As part of global agreements to tackle climate change, countries have to submit new carbon-cutting targets by early next year.
But the government is expected to announce its new target early, at the upcoming UN climate conference (COP29) in Azerbaijan in November.
It hopes this will set the ball rolling and encourage other nations to ramp up their plans.
“Britain is back in the business of climate leadership,” a spokesperson for the Department for Energy Security and Net Zero said.
The focus of COP29, though, will be money.
There are hopes for a new deal on the funds that richer countries – largely responsible for global warming – should give to poorer nations to help them tackle climate change.
The CCC calls for the UK to commit its fair share of money in line with its leadership ambitions.
It also says that the government should improve preparations for the impacts of rising temperatures back home.