Miss Allen is a full time Consultant Urological Surgeon at University College Hospital, London. At UCLH she is a Clinical Lead for the Urgent Urology Unit – a new service she developed with her team to relieve pressure from A&E. She was awarded an MD research degree by UCL for her thesis on the physical chemistry of urinary crystallisation and its inhibitors and was also awarded a Royal College of Surgeons Research Fellowship to help fund her work.

Sian has subspecialist practice interest in EndoUrology and Stone disease, treating complex cases from across the UK. She has a wide practice treating patients with obstructed kidneys from a variety of causes including malignancy, gynaecological disease and radiotherapy. A part from her busy clinical roles, she is a keen teacher, trainer and also a regular faculty member and lecturer on several teaching courses including the British Association of Urological Surgeons viva course, preparing trainees to pass the FRCS Urol exam.

Outside work, Miss Allen enjoys socialising, playing the piano and spending time with her young family.