The event, organised by the University of Manchester, attracts student team from around the country, with each athlete running 3.01km on a cross country course at the Wythenshawe Sports Ground.
City of Plymouth’s Weir was competing for the University of Birmingham. She actually ran two relay legs for two different teams.
She set the fastest time of 10.09 minutes running the first leg for one team, before then producing a 10.29 minute run on the third and final leg for another side.
The University of Birmingham did have the three fastest female runners at the event, with Weir’s team-mate Catrina Thomas clocking 10.12 minutes and Megan Davies 10.19 minutes.
After an impressive 2016/17 cross country season, which saw her impress for Great Britain at the World and European Cross Country Championships, Weir picked up an ankle injury in May training for the steeplechase.
It meant she missed the rest of the track season. However, she worked hard on her rehabilitation over the summer and is now back competing.
Weir was Great Britain’s top under-20 finisher at the World Cross Country Championships in Uganda in March. She also helped Great Britain to under-20 team gold at the European Cross Country Championships in Italy last December.