Only 34% of the breeders in the White Suffolk Society use LAMPBLAN. This project aimed to quantify differences between widely used, proven top sires across breeds to ascertain the position of the White Suffolk in terms of genetic merit, and thereby increase the breeders using LAMBPLAN to 40% of the White Suffolk Society members. The project group wished to identify and quantify differences in growth and maturity patterns between animals and investigate the effect this has on the ability of offspring to meet market specifications and provide information about market suitability for specific genotypes. The effect of extreme birth weight EBVs (high and low) on lamb survival was also investigated, providing information about the optimal range of birth weight EBVs. Producers aimed to develop an appreciation for fat and muscling measured using industry methods to identify its impact on dollar returns.