A 58-year-old woman attends her GP practice for routine follow-up. She has type 2 diabetes, hypertension, and hypercholesterolaemia. Her medications include Metformin, Ramipril, and Atorvastatin 40mg ON. Her latest lipid profile shows: Total Cholesterol 4.5 mmol/L, LDL-Cholesterol 2.8 mmol/L, HDL-Cholesterol 1.1 mmol/L, Triglycerides 1.9 mmol/L. According to NICE guidelines on cardiovascular disease risk assessment and reduction, what is the target for secondary prevention for LDL-Cholesterol in a patient like this?