The Electricity Commission ordered the delay of final prices for 19 May while the undesirable trading situation claim was investigated.

The indicative final prices for trading period 16 (the period of the undesirable trading situation claim) as calculated by the pricing manager were made available for participants' review. These prices include the effect of applying the high spring washer price situation relaxation methodology.

The Commission Board considered the claim of an undesirable trading situation for trading period 16 on 19 May 2009 on 9 June 2009. The Board found that no undesirable trading situation existed and ordered that final prices for 19 May 2009 be published.