A team from Leeds won the inaugural Triathlon Mixed Relay Cup in Nottingham.
The new format, which will make its Olympic debut in 2020, comprises two men and two women, who each complete a super-sprint triathlon - a 300m swim, 7.5km bike ride and 1.5km run - before 'tagging' their team-mate to take over.
The Leeds 1 team, made up of Tom Bishop, Georgia Taylor-Brown, Jess Learmonth and Aaron Royle, beat 16 other domestic and international quartets with a total time of one hour 18 minutes 58 seconds.