2. Insufficient glycaemic control (i.e. an HbA1c > 6.5% and <= 10.5%) despite treatment with diet and exercise and/or metformin (>= 1000 mg per day (or the maximum tolerated dose) at a stable dose or dosing frequency for 8 weeks prior to randomisation) and/or concomitant stable basal insulin (total daily dose must be <= 0.5U/kg with less than 10% of weekly dose change for 12 weeks prior to randomisation)