Len originally qualified with a BSc in Sports Physiology in South Africa and then undertook Physiotherapy training. He transferred to Medicine and qualified as a doctor in 1990. Len then obtained an MSc in Orthopaedic Engineering from the University of Wales, going on to complete his Orthopaedic specialisation.

Shoulder surgery was in its infancy when Len was training and his background in sports and rehabilitation sparked his interest in the shoulder, as little could be offered for most soft tissue problems of the shoulder at the time. He sought the expertise of the world leaders in shoulder surgery, undertaking a Fellowship with the late Steve Copeland and then Laurent LaFosse and Giles Walch in France.