Both sides in the Bus Eireann dispute are back around the talks table at the WRC today.
Discussions will resume at 11.0am, in a bid to solve the row over changes to pay and services.
The company has claimed it faces imminent insolvency if it can not cut costs in the next few weeks.
General Secretary of the NBRU Dermot O'Leary outlined what has happened in discussions so far.
"The best way to describe yesterday was the scoping out of positions," said Mr O'Leary
"Whilst we will engage with the company through the WRC, we remain with the view to resolve this will require a buy-in from all stakeholders."