Also at Visit 2, the study dietitian will review BG readings and food diary from the previous week and optimise ICR doses of rapid acting insulin. This ratio will then be used to calculate insulin doses for the study meals. On three evenings over the next 7 days, the children will eat a standard high protein/high fat meal. The evenings will not be set, but will depend on the child and family schedule. The child and family will be able to choose which days during the study period on which they complete the study meals but will be advised to avoid days when the participant has undertaken lots of exercise, has had frequent hypoglycaemic episodes or has been unwell.