My understanding is that this was a problem that arose from a particular feature on Microsoft Teams, which actually, ironically, was a security feature. If you're running an ordinary conference with Microsoft Teams, you can have a feature that announces who is doing the meeting. Normally, it would be their name, but if someone has not registered their name, it will read out the phone number of the person who is joining.
This had been disabled in the configuration that was being used for the broadcast. For reasons to do with where Microsoft puts its systems, I think they had been moved somewhere overnight and that change to the feature had been put back to the factory settings, as it were, which didn't become clear until they were actually in session.
My understanding is that apart from everything else, the chief executive of Microsoft has written to the Lords Speaker to apologize. That there has been a technical data breach of the House of Lords, I think is being referred to the information commissioner. They are switching to using the Zoom platform next week, so that particular issue has gone away, although, as a colleague from Scotland, I think, said earlier, all video conferencing platforms probably have some security aspects to them. The Lords certainly is back on track now, but as of next week, they'll be using exactly the same approach as the Commons.