There's yet more bad news for Simon Bridges and his leadership wobbles.

Newshub has learned that one of his veteran MPs Nick Smith, an MP for 30 years, has written a letter to Bridges and copied in his entire caucus.

The letter expresses disappointment - or as one of his colleagues put it to Newshub, "he's pretty pissed" - about Bridges setting up a new COVID-19 policy team.