Concerns have emerged at the depth of ousted minister Heather Roy's relationship with her most senior adviser, whose Beehive security clearance had just been blocked.

Rodney Hide has emphatically denied in Parliament ever suggesting to another minister that Heather Roy had used drugs.

Act's dirty laundry was hung out to dry today after attempts yesterday to keep their party implosion under wraps failed spectacularly.

A leaked dossier of Heather Roy's notes for the meeting that dumped her as Act deputy leader reveals the extent of the rift between her and Rodney Hide.

The highly damaging revelations in Heather Roy's 82-page statement of defence raise serious questions about Rodney Hide remaining as leader.

Leaked documents of Heather Roy's statement to the Act caucus portray Rodney Hide as an abusive, intimidating bully who tried to discredit and humiliate Roy into quitting.

Heather Roy's adviser has confirmed there was a bust-up over Act leader Rodney Hide taking a defence document from her office.

The manner in which Heather Roy was dumped has dented Rodney Hide's credibility and potentially weakened his hold on his party's leadership.

Relations between Heather Roy and Rodney Hide were so bad that she filed a complaint when he took a piece of paper from her office.

Prime Minister John Key says he doesn't know why Act deputy leader Heather Roy was rolled but says it won't destabilise the Act and National support arrangement.

Not a skerrick of the notion of accountability - on which Act bases its sales pitch - was apparent this afternoon, writes John Armstrong.

The Act Party has dumped Heather Roy as its deputy leader and voted first-term MP John Boscawen to the position.

A caucus meeting where minister Heather Roy is expected to be dumped by her parliamentary colleagues as deputy leader of Act is under way.