Second hand information tells me the required separation standard was not infringed. This was not due to positive control, the aircraft decided to move themselves off track.
In large pieces of airspace such as this, an unfortunate happpening is that aircraft are at the same level and are known that in the future they will be in conflict. This can be known for hours in advance. There are memory prompts that can be used to remind of who is going to hit who but often the aircraft are only in the airspace that they will break down in for a small time and these memory prompts can not be used. What happens then is that a situation you are on purpose forgetting, get forgotten. As a contrast in a small scale radar environment, a conflict is seen and pretty much immediately fixed.
For the record I do not work on the airspace this occured in and am just summarising a rumour I heard.