The Royal College of Nursing (RCN) and Unison members voted to support the original three-year pay deal in June.
However, in July Unison said that inflation was beyond the 2% assumption made at the time it negotiated the deal.
Re-opening the deal will have no effect on the 2.75% increase agreed for 2008/9.
Check out Healthcare Republic News on Monday morning for the first detail of the evidence submitted.
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