A top official with the GMB union has repeatedly refused to back Len McCluskey's threat of illegal strike action in an interview with talkRADIO.
McCluskey, a key supporter of Jeremy Corbyn, has said coordinated strikes by public sector workers are "very much on the cards".
Under British law, any strike must be removed by a ballot involving at least 50% of the union's members. But McCluskey has said he'd be willing to flout this law in pursuit of action.
However Rehana Azam, national secretary of the GMB union, declined to endorse McCluskey's comments despite repeated prompting from Sam Delaney.
Instead she focused her ire on the Government, saying its stance on public sector pay had left workers "enraged" despite today's u-turn on the 1% cap.
She also ridiculed the notion that the unions are attempting to remove Theresa May and put Jeremy Corbyn in office. Instead, she said, the unions are simply "putting the voice to public sector workers" on the pay issue.