A former eventer, Tamsin Addison became the first person in the world to regrow a bone in her upper arm after having cancer. She is now an international grade V para dressage rider and trainer based in England, competing for Ireland. Tamsin is part of our team of professional riders who put equestrian products through their paces in a real-life busy yard environment for a suitable period of time to test the item, before their thoughts are featured in our reviews section.