The theatre staff nurse will then prepare a small infusion pump. The mixture used in the pump will be pre-mixed by one of the clinical pharmacists at Middlemore hospital who will not be involved in patient care. The staff nurse will be un-blinded to the contents of the mixtures. The nurse will prepare the pump and load either the anaesthetic or saline solution. At closure, two small 2mm catheter will be placed in the peritoneal cavity at the site of the operation to infuse local anaesthetic. This will penetrate through the skin once closure is complete. This will be attached to a small infusion pump (On-Q pain buster). This pump will contain either a 270mls of 0.2% ropivacaine or 270mls of 0.9% saline. All members involved in patient care including surgical, anaesthetic and nursing teams will be blinded to the contents of this pump. The pump will be activated at a set rate of 4mls/hr immediately once the patient is in the post anaesthesia recovery room. The pump will run continuously. The patient will continue recovery on the ward as per ERAS protocol. After 68 hrs the pump will be stopped and the catheter will be removed in a similar fashion as routine drain removal.