All of the lorries taking the peas to the factory are numbered and divided into two compartments, A and B. The weight of the peas put into each compartment depends on the freezing capacity at the factory and each tip is recorded by the tractor operator. The peas can then be tracked to the factory and the factory can tell which field and which farm the peas have been grown on. This is very important for food traceability if there is a problem with a batch during processing. The trailer used is called a scissor trailer, as that is the mechanism used to lift the trailer up so the peas can be tipped into the lorry.