The Prime Minister has pulled out of attending Waitangi.
Mr Key has just announced he will not attend after failing to get a response from the marae to his concerns about an attempt to prevent him speaking about politics.
"The Prime Minister's Office has had no response to its letter sent to trustees at Te Tii Marae earlier today. Accordingly, the Prime Minister has decided he will not be attending celebrations in Waitangi this year," a spokesman said.
At the marae, members of the executive are understood to be meeting now to decide how to respond.
Mr Key said he received a letter last night from marae trustees saying he could not discuss politics in the wharenui and instead suggested political discussions be held in a political forum tent.