Continuous Glucose Monitoring System (CGMS) data will be collected at 3 time points. The mean proportion (%) of time spent either above (≥10mmol/l), below (≤3.1mmol/l) or within (3.2-9.9mmol/l) - which are our predefined glycaemic ranges - will be calculated for each participant over the recording period and adjusted for 24 hours. The study will compare these by treatment group for each time-point. The investigator will calculate change in proportion of time spent in each category from pre-Ramadan against during and against post-Ramadan within each group. The investigator will then compare any identified glycaemic shifts between treatment groups. The investigator will calculate the number of Continuous Glucose Monitor (CGM) low glucose events (≤3.1 and ≤2.2mmol/L) and CGM high glucose events (≥10.0mmol/L) within each treatment group and determine if the incidence changes across the three time points.