A bitter row erupted at the British Athletics Championships on Sunday with rivals and a coach lashing out at Laura Muir's inclusion in the 800m despite claims she had missed the entry deadline.
Muir was listed to contest only the 1500m in Birmingham but to the shock of the 800m field she instead lined up in the shorter distance for the heats on Saturday and won the final the day after.
The dispute centres on the allegation that the golden girl of British athletics missed the June 25 deadline to enter, with Muir's name not appearing publicly on the 800m start list until Saturday.
Rivals have lashed out at Laura Muir's inclusion in the 800m at the British Championships
A formal protest was issued shortly before Sunday's final to the track referee at the Alexander Stadium by former European indoor champion Matt Yates, who coaches Muir's 800m rival Revee Walcott-Nolan.
In a separate email to the referee, seen by Sportsmail, Yates made the extraordinary claim that British Athletics official Ian Hodge had admitted to him in a telephone call on Friday that Muir had in fact missed the deadline and only entered for the 800m and 1500m on Friday evening.
In a further allegation, Yates wrote that 'Mr Hodge also confirmed that he was pushed to enter Laura Muir by Neil Black (British Athletics' performance director), despite explaining to him that the deadline had passed'.
Muir won the final on Sunday despite initially being absent from the list of entrees for the event
British Athletics strongly denied all the claims, insisting that Muir had in fact entered for the distance at 6.08pm on June 24, at the same time as the 1500m, and that a technical glitch prevented the 800m entry from appearing on the extranet used by her rivals.
They also denied to Sportsmail that Hodge had told Yates that Muir missed the deadline, and rubbished the allegation that she was added under the advice of Black.
Muir went on to win the 800m in 2:01.22,