European breeding schemes have for many years routinely conducted evaluation of young (mainly at four to six years of age) sport horse as a part of their integrated breed improvement schemes (Whitaker and Hill, 2005 a). Such an approach has allowed assessment of horses as to their future worth as competition animals and helped to establish the potential genetic worth of animals to the populations. Furthermore such events act as part of the validation mechanism for the establishment of estimated breeding values. The UK has historically suffered from an unstructured and disparate approach to sport horse breeding (Whitaker and Hill 2005 a). However recently (over the last five years) various organisations have introduced competitions aimed at assessment of young sport horses. An example is the British Eventing Breeding Championships established in 2004. Four, five and six year old event horse compete in qualifying competitions and then participate in a one day championship event run in October. This study investigated the effect of both breed type and registry on final rank within competition for six year old horses completing competition in 2004 and 2005 championships.