On a train today from Leicester Square to King's Cross and part way along the train announced 'there is a defect' and then started giving random safety announcements and 'next train is ...' without saying a station.
It later announced King's Cross as Caledonian Road, before correcting itself at the station itself (and having told people to mind the gap many times while in the tunnels).
The screens were fine. Just audio, which seemed weird as I thought drivers often couldn't even hear the announcements - so why announce to the whole train there's a defect?!