During routine clinical care the clinicians involved with the study have had in-depth discussions with the women in their care including treatment options and the potential complications associated with surgery. Of particular concern to patients is how much pain they will be in, leading to the initial idea of the use of PNB to relieve post-op pain. Resultant anecdotal feedback suggested this resulted in lower post-op pain levels than other patients in the ward that had similar operations. This led directly to the development of the current project.