That same service suffered a brake failure about 2 weeks ago. Same story as you - with no announcements. However, service got going just before 7pm, but was stuck behind northbound DARTs etc. It also had the Enterprise stuck behind it all the way to Drogheda.
I think the announcements situation is getting worse. Millions invested in new track and rolling stock, yet when ever anything goes wrong, everyone forgets to tell the customers whats happening.
