Len runs a tertiary referral practice alongside a team that comprises specialist shoulder therapists, nurse specialist, pain specialist and clinical psychologist. This allows him to provide a service for many complex and revision soft tissue problems of the shoulder, as well as most common problems.

Len has pioneered and published on many procedures, such as:
- Hydrodilation for frozen shoulder
- LARS ligament AC joint reconstructions
- Pec Major reconstructions with allograft
- Arthroscopic tendon transfers
- Management of atraumatic shoulder instability
- Advanced shoulder rehabilitation
- Sports specific rehabilitation