Anti TPPA protestors have turned up to a function in Auckland where the Prime Minister and Trade Minister are due to speak.

The crowd at the Titirangi Golf Club numbers about 20 people, but are very vocal.

Reporter Alex Mason said they are "yelling TTPA no way, and asking people to toot for support."

She said they are getting a surprising number of toots from passers by. "There seems to be a number of people who are against the secrecy of the deal."

Just two police are providing security, and the protestors plan to stick around for the duration of the function.