Prior to main trials: Participants will be instructed to follow a recommended diet plan for 48 hours prior to testing. Participants will be required to read and sign an informed consent form and medical questionnaire which will be reviewed during each visit to the laboratory. 24 hours prior to each trial, participants will be fitted with a real-time continuous glucose monitoring system (CGM). The CGM consists of a sensor which is inserted into subcutaneous tissue which is secured in place with a waterproof adhesive dressing. Sensor readings are obtained and stored in the memory of the monitor which is attached to the indwelling sensor. Glucose readings are provided on the screen of the monitor in real-time. Alarms will be set on the monitor to notify participants if glucose levels are low (<3.9 mmol/L) or high (>14 mmol/L) during the pre-trial period. For calibration purposes, the participant will be required to input blood capillary blood glucose values a minimum of 4 times per day (at meal times and before bed) using their blood glucose finger-prick meter. The CGM will be removed on the day after the trial at a time convenient for the participant, so that late-evening and nocturnal glycaemia can be captured. The CGM monitor will also act as a safety measure to alert participants to glycaemic excursions following the intervention. Participants will be instructed not to use real-time CGM glucose values to determine corrections to blood glucose (additional carbohydrate / insulin administration).