Resolved message from one of our suppliers:.
“We are writing to inform you that our provider has successfully resolved the issue affecting Text To Speech (TTS) MT delivery to Landlines in UK
Incident Start Time: 2020-03-18 08:00 UTC
Incident End Time: 2020-03-19 16:30 UTC
Impact: Text To Speech (TTS) MT messages may have been undelivered to landlines UK in the above mentioned time-slot.