Northland MPs Kelvin Davis and Winston Peters are part of the parliamentary contingent that will travel to England to take on their counterparts from other countries in the Parliamentary Rugby World Cup in September.
Air New Zealand is providing discounted flights for the MPs, who have been granted special leave to take part in the competition.
The tournament from September 10 to 23 overlaps with the start of the Rugby World Cup.
Politicians going include Corrections Minister Peseta Sam Lotu-Iiga - who is currently under pressure over allegations of violence in jails.
Mr Lotu-Iiga will have to put parliamentary rivalry aside for the games as one of his teammates, Te Tai Tokerau MP Mr Davis, has been attacking him in Parliament this week over violence at Mt Eden Prison.