@SJCooper - this is a separate issue to the SignalR issues reported previously which we have resolved. When investigating this, we found that we were not receiving Trams data from the operator. We have raised this with them and the TfL Trams department and they are working to restore service. We’ll try to keep you posted via this thread (our ref: SVC-5868).
Bear in mind that we have long running accuracy issues that the operator has not yet been able to resolve - see https://techforum.tfl.gov.uk/t/tram-countdown-arrivals-info-very-inaccurate-5-mins/189
Service Performance Manager - Digital