Rachel Ayrton and Eden Davis began their year by setting indoor personal bests at Lee Valley.
Ayrton, 17, did well to maintain her footing through an overcrowded 800m to record 2:31.89 in the New Year Open, while Davis, 17, completed the 60m in 6.94 at the Metaswitch Games.
Lucie Wolfenden, 15, set indoor bests of 9.13 for 60m and 3.97m in the long jump in the Sale Harriers Open at Sportcity.
Highgate Harrier Hannah Viner, 20, placed 13th in the Inter-counties Cross Country Championships at Oxford.