Every Beat Of My Heart Lyrics

Lyric discussion by catemed 

Cover art for Every Beat Of My Heart lyrics by Rod Stewart

I wonder about this song as I had always believed this was about the war to reestablish Charles as the catholic king of Great Britain -the blood red rose; the emerald isle and so on. Rod even refers to him self as a 'jacobite'. However there is suddenly a train in the middle of it. Can anyone tell me why?