Practice question

A 60-year-old man with poorly controlled hypertension (average BP 165/95 mmHg despite ramipril 10mg OD and amlodipine 10mg OD) is reviewed. His U&Es show potassium of 4.5 mmol/L and eGFR 70 mL/min/1.73m². He has no proteinuria. According to NICE NG136 (Hypertension in adults), what is the next most appropriate antihypertensive medication to add if he is of Black African or African-Caribbean family origin?