Janet has set a number of World Masters Records. Most recently, in 2019 she set a new record for the 500m TT (50-54) with a time of 37.026. She was part of the World Masters Team Pursuit team that set a new World Masters record in 2014 and 2015, in October 2012 she set a new world record for the 500m TT (45–49 category) with a time of 37.419. The previous year she set a new world record for the 200m TT (45–49 category) with a time of 12.229, bettering the previous record which had stood since 2002, she also set a new record for the 500m TT (45–49 category) with a time of 37.429. Previous to this, in October 2006, she broke the World Masters Record (40–49 category) in the 500m TT in Manchester, with a time of 37.239, she also holds a number of European Masters Records. Birkmyre broke the National Tandem Record for 5 km on 16 May 2006 in a new time of 6:45:848. Janet also currently holds nine National Masters track records. British cycling
