A new non-radioactive magnetic seed-based breast tumor localization device is under investigation in the UK. The Sirius Pintuition device uses a small implantable magnetic seed and detector for precise localization of breast tumors ahead of surgery. Edward St John, MBBS, FRCS, PhD, The Royal Marsden NHS Foundation Trust, London, UK, discusses the feasibility study currently underway and future plans for national roll out of the technology. If efficacy and safety are demonstrated in initial studies, a national investigation will commence through the iBRA-NET to compare the Sirius Pintuition device to wire-based methods as well as other new localization devices. The iBRA-NET is a multidisciplinary network of breast and plastic surgeons focused on evaluating new surgical techniques, products and implants. Evaluation of several localization devices has already begun, aiming to compare outcomes, identify key learning points and inform a future prospective trial in breast localization surgery. This interview was recorded via an online conference call with The Video Journal of Oncology (VJOncology).