Former British and Irish Lions had coach and Telegraph Sport columnist Sir Ian McGeechan has picked out a exciting youngster from each home nation who is set to take the world by storm.
#1. Louis Rees-Zammit, 20, Wales
McGeechan said: “You cannot put a price on outright pace. Rees-Zammit has it in abundance, and, combined with his finishing ability, you begin to understand why the hype surrounding him has been so intense.”