When babies are introduced to solid food before the age of 6 months there is some evidence to suggest an association with being overweight, particularly in babies who are formula fed. However, the most recent Infant Feeding Survey, carried out in 2010, found that 30% of mothers had started the complementary feeding process by 4 months and that these parents were more likely to introduce their baby to processed baby foods. The aim of this study was to better understand the relationship between milk type in the first 6 months and complementary feeding methods. By identifying characteristics associated with low compliance, it is hoped that the results of this study will enable health visitors to target their advice, providing additional support to those who are most likely to need it, with the aim of improving compliance with current recommendations for starting solid food.