Alexander secured the 200m and 400m race wins with his times of 24.65 and 54.29.
Lewis posted a time of 2:09.78 to win the 800m race.
Haverfield won the 1600m event due to his 5:12.21 effort.
Conlon won the 300m hurdles race with his time of 45.99.
Seyfang won the discus and shot put events with his throws of 146-8 and 47-6.