Trip, Kbag and Lover - real names Alberto Carrasco, 19, and 23-year-olds Jack Gilbert and Harrison Scott-Hood - had planned to spray their tags and go home.
Mr Carrasco had contacted his parents Isabel and Carlos at 22:00 BST on Sunday to say he would be back in time for dinner.
At 07:34 the following morning, three bodies were spotted on the tracks and police had to tell three families their boys would never come home again.
Because as Supt Matt Allingham from British Transport Police said, "There isn't a safe refuge up there. If they've been caught in that section of track when a train came through then they really wouldn't have had much option."