Will there be a Manukau East by-election?

Kate Shuttleworth at NZ Herald reports:

Manukau East Labour MP Ross Robertson has announced he will retire from Parliament.

He said today he will stand for the Otara/Papatoetoe local board election this year.

Mr Robertson has been in Parliament for 26 years.

“It is time to have a new MP for Manukau East. I think I can be more effective in local Government,” he said.

“It is not possible to be on a local board and be an MP, so I will retire from Parliament.

But when? Labour strongly criticised a National MP who did not resign from his city council seat once he was elected. So of course I expect Labour will demand Ross resign his seat if he is elected to the Otara/Papatoetoe seat in October.