LONDON (Reuters) - Tony Hall will step down as the director general of the BBC in the summer to make way for a new person who will negotiate the future for the broadcaster with the government, he said on Monday. Britain's publicly funded broadcaster will need to negotiate a new charter with the government by 2027 and hold a mid-term review in 2022. The BBC is one of Britain's main news providers, as well as the biggest single television and radio broadcaster and the voice of the country to..