The group drew-up new plans including:
- Early warning system: creating a system so that organisations can alert each other rapidly when they discover disinformation that threatens human life or disrupts democracy during elections. The emphasis will be on moving quickly and collectively to undermine disinformation before it can take hold.
- Media education: a joint online media education campaign to support and promote media education messages.
- Voter information: co-operation on civic information around elections, so there is a common way to explain how and where to vote.
- Shared learning: particularly around high-profile elections.
BBC Director General Tony Hall said: "Disinformation and so-called fake news is a threat to us all. At its worst, it can present a serious threat to democracy and even to people's lives.
"This summit has shown a determination to take collective action to fight this problem and we have agreed some crucial steps towards this."
Further details will be released at a later date.