Following an investigation it has become apparent that a handful of people didn't receive ballot papers.
We could fight a legal challenge from the company (Hoyer) but we believe it is important that everybody has a say which is why we are re-balloting.
Our legal team are drawing up the notice for the re-ballot and confirming the ballot timetable and we anticipate the ballot will take place quickly over the next couple of weeks.
In the meantime we remain committed to finding a negotiated outcome.
ITV News has obtained details of the offer at the centre of the petrol tanker row, ahead of talks to avert strikes by fuel tanker drivers.
The unions may have to re-ballot over the tanker strike dispute, as the original ballot may be based on a flaw.
The union Unite are facing a Friday afternoon deadline on whether or not to call industrial action in the fuel tanker driver dispute.