Our headset crackles as the first radio message heralds the start of activity. "30 seconds", a voice on the other end says, before the start of the practice session is accompanied by "Cars on track". It's Friday afternoon in the Formula 1 Singapore Grand Prix, and we are standing on the outside at Turn 5 as cars start streaming by.<br>"We" means ourselves and over a dozen officials donning orange ...<a class='more' href='https://www.autosport.com/f1/news/day-in-life-of-f1-singapore-gp-marshal/10772829/?utm_source=RSS&utm_medium=referral&utm_campaign=RSS-ALL&utm_term=News&utm_content=uk'>Keep reading</a>