In the run up to the 2018 UCI Cyclo-cross World Championships, Pidcock won his first British National Under-23 Cyclo-cross Championships title in Hetton-le-Hole, winning the race by over a minute from his next closest competitor. However, despite being considered the favourite for the Under-23 title at the Worlds, he could only finish 15th after enduring a poor start to the race when he lost his footing on the pedals.