Children and young people who manage diabetes with injection therapy are at risk of using a poor technique. This may have serious consequences, including poor glycaemic control, leading to the longer term complications of diabetes. The Forum for Injection Technique (FIT) is an international body that promotes best practice in injection technique. This article summarises the forum’s UK-specific guidance, with particular reference to the nursing care of children and young people with diabetes. The FIT UK board, of which the author is a member, consists of experienced diabetes specialist nurses.