Adverse events/patient safety: It is not anticipated that participants involved in this project will be subject to adverse effects. Pudendal Nerve blocks are very rarely associated with complications such as anaphylaxis, haematoma and infection at the site of injection, ischial paraesthesias and systemic toxicity due to intravascular administration. The risk of these rare complications would apply to any nerve block currently used in routine clinical practice. The risks will be further minimised by the procedure being carried out by a Gynaecological Consultant experienced in the procedure, with full anaesthetic and surgical team back up if required. The CI will be informed of any adverse effects within 24 hours and they will be reported following local NHS R&D protocols, with a copy of any adverse event form stored in the project site file.