Boris Johnson's tweet of a picture of a virtual Cabinet meeting which included personal details has raised security concerns.
The Prime Minister's post showed the meeting ID number on video conferencing platform Zoom, as well as the usernames of some ministers taking part.
Mr Johnson's communications with his top team of ministers is secure, Downing Street insisted after the online meeting. But according to one cybersecurity expert, the Prime Minister's tweet showing meeting details broke a key rule about security when using such technology.
Jonathan Knudsen, senior security strategist at Synopsys, said those using tools such as Zoom must "be careful about sharing the meeting information". "Video conferencing helps people stay connected by