Complex sentence: The West Coast Main Line (WCML) is the most important intercity rail passenger route in the United Kingdom, connecting the major cities of London, Birmingham, Coventry, Edinburgh, Glasgow, Liverpool and Manchester.
Split into simpler sentences: The West Coast Main Line (WCML) is a major inter-city railway route in the United Kingdom. The WCML is the most important intercity rail passenger route in the United Kingdom, connecting the major cities of London, Birmingham, Coventry, Edinburgh, Glasgow, Liverpool and Manchester.