First it was the British indoor 5,000 metres just four days into the new year , then it was the European Indoor 3,000 m at the start of this month .
Muir has completed her hat - trick by breaking the European indoor 1,000 m mark in Birmingham .
First it was the British indoor 5,000 metres just four days into the new year , then it was the European Indoor 3,000 m at the start of this month , and Muir has completed her hat - trick by breaking the European indoor 1,000 m mark in Birmingham .