Former Great Britain international Sean Long left London Broncos because he failed to meet the professional levels expected of him, the First Utility Super League club have announced.
The ex-St Helens scrum-half quit the London outfit earlier this month, just weeks after joining the backroom staff, and claimed it was because the club wanted to make him part-time.
On Sunday, the Broncos released a statement offering their side of events.
It read: "The London Broncos would like to clarify the situation concerning Sean Long.
"Unfortunately, Sean's performances as an assistant coach did not meet the professional levels expected at the club. As a result, his position as full-time assistant is no longer continuing.
"Whilst this decision had to be made by the club, we do wish Sean the best for the future."
It is the second time that Long has left a club under a cloud. Last July, Wigan Warriors terminated his contract just three months into a job as an assistant coach after he failed to "integrate into the disciplined and already high-performing culture at the club".
Long, 37, who brought his colourful playing career to a halt due to injury in August 2011, is now looking for a fifth coaching job in 12 months.
He resigned as assistant at Salford Red Devils last April and, after his brief stay at Wigan, he ended the season as football manager at Featherstone.
He was also assistant coach of Samoa in the 2013 World Cup.
London Broncos have appointed Australian Joe Grima as the official assistant to head coach Tony Rea.