Party said disciplinary action would be dropped if she apologised.
Crunch meeting with general secretary to seek reassurances
Union chief's team say he was unaware of the social media post
The five things you need to know about politics today
Corbyn critic questions 'integrity of process' during 'politically charged time'.
Corbyn loyalist chosen by National Executive Committee
Compliance unit chief John Stolliday and Policy/Research director Simon Jackson quit
Crucial swing vote from the big union.
Once touted as future general secretary.
He said his 'aims had been fulfilled.'