In 2016, Ramadan takes place throughout the months of June and July. At this time of year in the UK, between dawn and sunset there are approximately 14.5 hours of daylight at the beginning and 13 hours towards the end of Ramadan during which there is fasting. This is a significant portion of the 24 hour day; thus abstinence from food for such a prolonged period poses an increased risk for those with T2DM especially if their medicine regimens are not altered to accommodate this. In light of this the study aims to determine if the addition of Canagliflozin (Invokana™) therapy to monotherapy of metformin is more effective at achieving the double composite endpoint of a reduction in HbA1c (≥ 0.3%) and weight loss (≥1kg) 3-4 weeks post-Ramadan. The study will also include patients currently on dual therapy, specifically metformin plus a sulphonylurea, pioglitazone or repaglinide to determine whether switching to metformin plus Canagliflozin (Invokana™) is more effective at achieving the composite endpoint compared to those remaining on previous dual therapy. There are a number of secondary outcomes including weight loss, rates of hypoglycaemia, blood pressure and a number of biochemical endpoints.