In order to keep on a par with other European horse breeding countries, Britain is now aiming to develop genetic evaluations for British bred sport horses. Data has been collected from the Young Horse Evaluation Series (YHE). The traits measured include a veterinary assessment, an assessment of conformation and assessment for specific traits involved in showjumping (SJ), dressage (D) and eventing (E). For E, paces, loose jumping and ridden jumping are assessed, for SJ only the two jumping traits are assessed and for D only paces are assessed. The qualities looked for in the E traits differ from those measured for SJ and D. A total score is also given for each discipline, which combines the scores from performance with the veterinary and conformation scores. Each trait is scored on a scale of 0-10, in which 0 equates to poor and 10 to excellent. A preliminary investigation was carried out to determine the heritability of each of the traits.