Patients will be randomised by computer generated random numbers and opaque envelope methods. In the treatment arm patients will receive 275mL of 0.2% ropivacaine after wound catheter insertion or in the placebo arm, receive 275mL of 0.9% normal saline in a similar fashion. One theatre staff nurse who will not be involved in patient care will be given the blinded envelope and the pre-prepared lidocaine or saline mixtures in the theatre drug room. The mixtures will be unlabelled and appear similar in color. All members of the staff involved in patient care including the anaesthetist will be blinded to the solution administered. The theatre staff nurse will then prepare a small infusion pump (AutoFuser). 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 local anaesthetic or saline solution. At closure, one small 2mm catheter, with 30 small fenestrations at the end, will be placed in the peritoneal cavity between the onlay mesh and parietal peritoneum to infuse local anaesthetic. This will penetrate through the skin once closure is complete. This will be attached to the infusion pump (AutoFuser). This pump will contain either 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 the surgical team. After 68 hrs the pump will be stopped and the catheter will be removed in a similar fashion as routine drain removal.