The New Zealand First leader says they'll be telling the National Australia Bank we want our bank back - as he lays out plans for the Government to buy BNZ.

The party will campaign on the purchase - after its sale in 1992 - and merging it with Kiwibank to create a National Bank of New Zealand. 

Winston Peters told Mike Hosking that the bank may not be for sale, but they'll make sure it is.

He says he doubts the National Australia Bank would turn them down - so Kiwis won't be ripped off for much longer if NZ First gets back in. 

LISTEN ABOVE