The new talks will involve Hoyer, even though Unite is to re-ballot its members at the firm after the union discovered that a number of its members had not received ballot papers during the original voting last month.
The employers and Unite have agreed to an extension of the validity of the ballot period for a further four days until Tuesday, to enable these talks to take place.
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.