Ministerial investigation launched into whether Lees-Galloway used tax dollars to fund his affair

The political scandals are showing no signs of letting up as the election draws closer, with police and ministerial investigations digging into both major parties. 

A ministerial investigation is underway into whether disgraced former Minister Iain Lees-Galloway used taxpayer money to fund his affair.

It comes as police launch a new investigation into inappropriate messages sent to young women by Andrew Falloon - the disgraced National MP who left the job on Monday.

Five women have now come forward - and National leader Judith Collins says she's dealing with it. 

"Another one came through last night. I've talked to the family and I've suggested that they go to the police," she said.

Collins deflected to this week's other disgraced MP - Iain Lees-Galloway  - who was fired on Wednesday for having a relationship with a staffer.

The Opposition leader is suggesting the Prime Minister is holding back details.

"She's no doubt got something significantly more than what I know about it, otherwise it wouldn't be an abuse of power in and of itself."

But she has no evidence, telling Newshub she has "no details" of it. 

On Thursday, the Prime Minister confirmed there will be a ministerial investigation into Lees-Galloways' expenses to ensure he didn't use taxpayer money to fund his affair.

Ardern said there will be a "broad scope" to ensure there was no "improper use of taxpayer money".

But the bad behaviour is not limited to the big parties and the grown-ups - more Young Act members have quit over what they are calling a toxic culture while an investigation into allegations of sexual harassment is underway.

Safe environments are the goal, across the board.