You are conducting an annual check on a 81-year-old male in a GP surgery. This patient is fit and well and has no relevant past medical history of note. On examination, you note that his blood pressure reads at a value of 150/85. You follow the NICE guidelines and conduct a second reading in the other arm, which reads at a value of 151/87. As per the NICE guidelines, what is the next most appropriate step in this patient’s care?