Newsnight
In a heated BBC Newsnight exchange, the RMT Union leader also said he would be happy to negotiate with the Tory government.
Adam Holloway makes his point with an iPad on live TV.
The broadcaster announced she was leaving the BBC after 20 years to launch a new Global podcast in February.
BBC correspondent Jon Sopel has also quit the broadcaster alongside the Newsnight presenter.
The broadcaster confirmed she'd already made her final appearance on the current affairs programme.
The BBC Newsnight presenter said she was "wrong" to share a post from former Tory cabinet minister Rory Stewart without context.
Business minister Paul Scully struggled to defend Boris Johnson in a heated interview with Emma Barnett.
"I know NHS workers, by the way, who have had a drink after a day's work," Lord Marland claimed.
"I apologise for mentioning Prince Charles, rather than Prince Andrew."
Newsnight’s Kirsty Wark responded with an “ooofft”.
About Newsnight
Newsnight is a daily BBC Television current affairs programme which specialises in analysis and often robust cross-examination of senior politicians. Jeremy Paxman was its main presenter for over two decades and the show is now hosted by Evan Davis, Emily Maitlis and Kirsty Wark