A 58-year-old man presents to the emergency department with 90 minutes of central crushing chest pain radiating to his left arm and jaw. His ECG shows ST elevation in leads II, III and aVF. He is pain-free after sublingual glyceryl trinitrate and his blood pressure is stable. The nearest percutaneous coronary intervention (PCI) centre is 30 minutes away. What is the most appropriate next step in management?