Laybourn clinched bronze in the final in a time of 8.19 secs with Robinson a notable fourth in an improved time of 8.20 secs.
Fletcher also picked up a bronze in the 100m, clocking 13.1 secs behind Holmfirth's Tom Jennings, who won in 12.6 secs.
Katie Hewitt at 300m hurdles was 6th in her heat in 48.32 secs.
She had a long jump of 3.63m, clocked 9.13 secs in the 60m and recorded 5.17m in the shot.
In boys junior 14 coxed quads, George Watson's were winners by 7 secs from Kings College School.
