What else is there?
Zoom's policy regarding their ability to use your content is absolutely scary. But I have been looking at video conferencing generally, and not impressed by any of them. Does anybody know of a video conferencing system that would be regarded as secure enough for a virtual board meeting by a listed public company? That is, both physically secure, and not owned by somebody who is likely to monitor users content?
On another question, doesn't GCHQ have someone full time in No. 10 to keep an eye on what happens there, and how it happens?