Ms. Selina Reidy joined West Yorkshire Police in 2006 and undertakes footwear mark coding and screening comparisons for both volume and major crime cases. As part of this role, Selina also provides training to Police officers and staff across the Yorkshire and Humber region in footwear mark evidence. In 2013, Selina qualified as a podiatrist and joined the Forensic Unit at Sheffield Teaching Hospitals NHS Foundation Trust. This opportunity enabled her to expand her scope of practice to incorporate footprint comparison (excluding ridge detail), feet-in-shoes comparison and forensic gait analysis which compliments her role at the Police. Selina teaches on the Forensic Podiatry MSc and is a Lecturer Practitioner in podiatry at the University of Huddersfield. She is also an external examiner for the diploma in Forensic Human Identification, Academy of Forensic Medical Sciences and an external supervisor for undergraduate forensic podiatry projects at the University of Northampton.

Prof. Ivan Birch is Consultant Expert Witness in forensic gait analysis with Sheffield Teaching Hospitals NHS Foundation Trust and Emeritus Professor of Human Sciences. Ivan graduated in 1978 with a BSc Joint Honours in Science from the University of Salford, gained an MSc in Human Biology from the University of Loughborough in 1980, and was awarded a PhD in Biomechanics by the University of Brighton in 2007. He has extensive experience of teaching biomechanics, anatomy, physiology and research methods, and is a Professional Member of the Chartered Society of Forensic Sciences. In 2015 he was awarded the status of the Chartered Scientist by the Science Council and College of Podiatry in the UK for his work in gait analysis as evidence. Ivan is included on the National Crime Agency Specialist Operations Centre Expert Witness Advisers Database in the UK, and has more than 35 years’ experience of gait analysis.