The BBC began running a longer News At Ten, regional news and weather package after the 2015 general election, leading to a 15-minute overlap with Newsnight.
The corporation said it believes the scheduling change will be better for audiences, with those who want more in-depth news and analysis able to switch over to Newsnight, whilst also allowing for a more consistent start time for viewers to watch the programmes that follow.
The occasional news and weather events that require longer programmes will be confined to moments of national or local significance, the corporation said.
The BBC is said to be concerned about losing younger viewers to rivals such as Netflix, Amazon and Now TV, which are taking a much broader audience share.
Research also suggests that the younger generation are shunning television in favour of online streaming and entertainment.