[1] While attending The Westleigh School, Warburton and his younger brother Lucas played together with the Manchester Mavericks basketball team.

[3] Later, he was selected to represent England North at the 2012 Sainsbury School Games, a multi-sport event for school-aged elite athletes.

He competed with Great Britain at the 2014 Under-22 Wheelchair Basketball European Championships, helping them win a gold medal and individually being named the Disabled Sports Achiever of the Year.

[6] In the same year, he also played a role in Great Britain's Junior Men's performance at the Kitakyushu Cup, helping them earn a silver medal.

[7] Four years later, Warburton played a major role in Great Britain's World Championship win in Hamburg, Germany, and was named Most Valuable Player for the men's tournament.