National will use its veto rights to scupper a bill to extend paid parental leave to six months even if it has majority support, with critics and the bill's Labour sponsor calling the move unfair.

Finance Minister Bill English said yesterday his party would veto the bill, sponsored by Labour MP Sue Moroney, that would increase the 14 weeks of paid leave to 26.

Mr English said the Government would have to borrow more money to fund it at a time when it was trying to reduce its deficit.

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