A 58-year-old man with Type 2 Diabetes and known Chronic Kidney Disease (CKD) stage G3b A3 is reviewed. His eGFR is 40 mL/min/1.73m² and his Albumin:Creatinine Ratio (ACR) is 45 mg/mmol. His BP is 135/85 mmHg and HbA1c is 55 mmol/mol. He is currently taking Metformin, Gliclazide, and Ramipril. According to NICE guidelines, which medication should be added for renal protection?