Northland MP Rt Hon Winston Peters is advising the Prime Minister that his challenge over his claim on spending all his time on his boat in Northland fishing, since becoming MP there, being totally untrue, still stands.

'Mr Key has now gone further and said: ‘There's plenty of pictures of Winston on boats out there, just maybe not his boat'. Well that statement is totally untrue as well,” the New Zealand First Leader said.

'Mr Key should come clean and ‘quit while he is behind',” Mr Peters said.

On Wednesday Mr Peters challenged Mr Key to find a witness showing he has been out fishing on his boat since the Northland by-election, however Mr Key has refused.

'As I said previously, he should apologise, pay $100,000 to a Northland charity of my choosing, and stop wasting Parliament's Question Time with such blatant untruths.

'How can you believe the Prime Minister on questions on the TPPA when he can't be honest on simple issues like this?”