A former National leader says this morning's party caucus meeting will be like a "wake", as 20 outgoing MPs say their good-byes.

MPs will meet behind closed doors at Parliament this morning, after recording its worst election result since 2002.

Former National leader Don Brash remembers arriving for his first caucus meeting, after being elected to Parliament in that 2002 election.

He told Kate Hawkesby if that meeting is anything to go by, emotions are likely to be running high.

"There will be a lot of grief, but the anger will come later, and fingers will be pointed in all directions, you can be sure of that."

Brash says some MPs could return in the future if National claws back supporters.

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