The prime minister of Great Britain, Burnham, is set to announce a new public body dedicated to investing in the nation's electricity grid. This announcement will come during his first conference speech as the leader of the Labour Party. The initiative aims to directly address and reduce energy costs for citizens across Great Britain. Burnham intends to position energy cost reduction as a key policy objective under his leadership. The new body will be responsible for strategically investing in and modernizing the electricity grid infrastructure. This move signals a commitment to long-term energy security and affordability for the people of Great Britain. Further details regarding the investment strategy and timeline are expected to be revealed during the speech.