Judith Collins is batting away rumours that she is gunning for the National leadership saying she has "faith" in Simon Bridges. 

The revelation follows weeks of speculation surrounding the party's leadership and questions over the safety of Bridges' tenure.

However speaking with Kate Hawkesby this morning, Collins said she is backing her leader and focusing on the job at hand. 

"I always, always support the leader and of course, I support Simon. He is doing a tough, tough job and he is doing the job and that's what we ask him to do."

She said it is very difficult for a party to be successful in opposition unless they can "express faith in each other".

Collins reiterated that she's just getting on with the job and doesn't know where the rumours surrounding Bridges leadership are coming from.

"I don't know. It's really interesting how these things operate."

The National Party housing spokesperson also hit out at Phil Twyford over his handling of KiwiBuild, saying he is "way more likely to get it wrong than Simon Bridges".

However, she did admit that the rumours "take up space", but she said they aren't a distraction for the party.

"I have to keep constantly answering it like I am today when really I want to be talking about KiwiBuild."

Collins said they are focusing on the problems surrounding KiwiBuild and the upcoming budget.

She also brushed off questions around whether she will be the leader at some point.

"You've just got to let people get on with the job and support them and that's what I have been doing."