Whose 1500 metres UK record did athlete Laura Muir break in 2016?

Laura Muir (born on the 9th of May 1993 in Inverness, from Milnathort) is a British middle distance runner who specialises in 800m, 1500m, 3000m and 5000m races. She became British record holder over 1500m in June 2016 for the first time at the London Diamond League.

Muir made her international debut in the 2011 European Cross-Country Championships, when she was part of the Great Britain junior women's team that won gold. At the end of the year, she was a nominee in the Daily Record Young Athlete of the Year awards.

At the 2016 Diamond League event at the Olympic Park in London 22 July she ran 3:57.49 for 1500 metres to break Dame Kelly Holmes' British record. On 27 August 2016, at the Paris Diamond League meet, she lowered her Personal Best and the National 1500m record to 3:55.22. Her time also made her the fastest woman in the world over 1500m for the year. In 2016, she became only the third British woman to win a Diamond League title as she won the 1500m title in Zurich