Dani King, Joanna Rowsell and Laura Trott combined to win Olympic team pursuit gold two years ago - on Friday they'll be rivals in the 3000m individual pursuit at the Commonwealth Games in Glasgow.
Olympic champion Jason Kenny admitted he was lacklustre in men's sprint qualifying but claimed he'd bounce back and he'll be joined by Matthew Crampton and Philip Hindes. And Andy Tennant and Steven Burke, silver medallists in the team pursuit, go in their individual event.
British champion Chris Walker Hebborn will go for gold in the 100m backstroke after setting a new Games record in Thursday's heats - but his biggest rival could be team-mate and defending champion Liam Tancock.
In addition Fran Halsall starts her 50m freestyle campaign as she seeks to upgrade her silver from four years ago while Siobhan Marie O'Connor, the fastest qualifier, goes in the 100m butterfly, where Welsh swimmer Jemma Lowe will be among her rivals.
At the Barry Buddon Shooting Centre, rising star Amber Hill, just 16 and the youngest ever winner of a World Cup event, goes in the women's skeet.
Medals decided today
Swimming: men’s 200m freestyle, 100m backstroke, 50m butterfly, 400m individual medley, 4 x 100m freestyle relay; women’s para-sport 100m freestyle S8, 50m breaststroke, 100m butterfly.
Cycling (track): men’s para-sport 1,000m time trial B tandem, sprint, 4,000m individual pursuit;women’s 3,000m individual pursuit.
Gymnastics (rhythmic): women’s individual allround.
Judo: men’s - 73kg, -81kg gold and bronze medal matches; women’s - 63kg, -70kg.
Shooting: men’s 10m air rifle, women’s skeet, 10m air pistol.
Weightlifting: men’s 62kg, women’s 53kg.
Elsewhere, preliminaries continue in the badminton, boxing, hockey, lawn bowls, netball, squash, table tennis.