Protesters rally ahead of PM's visit to Katikati

3.17pm: Prime Minister John Key has now left Katikati, and a large angry group of protesters, with a big smile on his face.

National MP for Coromandel Scott Simpson organised the Katikati meeting, held this afternoon in the town hall.

About 100 protesters yelled abuse at Mr Key when he arrived and when he left.

However, Mr Key still display a large smile as his car drove away, a reporter at the scene said.

Mr Simpson said Mr Key discussed current issues such as the potential flag change, Trans Pacific Partnership and midwives case inside the meeting.

None of these issues were discussed by Mr Key to the party outside, holding signs and flags about the very same issues.

Mr Simpson said he acknowledged people's right to protest.

2.12pm: Prime Minister John Key has been greeted by an angry mob of protesters in Katikati this afternoon.

Mr Key is in the Western Bay of Plenty for a private meeting at the Katikati town hall, where about 100 protesters have gathered armed with flags and signs against the Trans Pacific Partnership (TPP).

Police and Maori wardens were among the crowd and attempting to keep things calm.

A reporter at the scene said protesters were yelling chants such as 'TPPA, takes people's power away'.

On his arrival, Mr Key was quickly ushered in to the hall through a side door and only offered a quick glance to the protesters, the reporter said.

People inside the hall had now closed the curtains, she said.

Earlier: Protesters are gathering outside Katikati War Memorial ahead of Prime Minister John Key's visit.

About 20 protesters armed with signs and the flag have gathered outside the hall where police and Maori wardens have also arrived.

Mr Key is expected to arrive at the hall about 2pm.

More soon.