Original: It is the main artery running north from Parliament Square, towards traditional Charing Cross, now at the southern end of Trafalgar Square and marked by the statue of Charles I, which is often regarded as the heart of London.
Simplified: It is the main street running north from Parliament Square, towards traditional Charing Cross, now at the southern end of Trafalgar Square and marked by the statue of Charles I, which is often regarded as the heart of London.