The union SIPTU said it won't know whether Dublin Bus drivers want to go on a sympathy strike with their Bus Éireann colleagues until tomorrow.

Solidarity TD Bríd Smith had claimed they'd voted 'overwhelmingly' in favour of picketing, but the union says it's still counting the results of a ballot.

SIPTU Organiser, John Murphy, said: “Union representatives are currently counting the ballot of all grades of SIPTU members in Dublin Bus. This count will not be completed until tomorrow morning.

"Following the completion of the ballot an official and correct result will then be released by the union.”

The Iarnród Éireann ballot result is not due until 21 April.

However, both ballots may be overtaken by events if the Bus Éireann dispute is resolved in the meantime.

The Bus Éireann dispute has ended up in the Labour Court where management and workers are still trying to reach a deal on cost cutting.

Tomorrow will mark the 21st day without services for commuters.