Labour Party leader David Shearer says a shake-up of staff in his parliamentary office had been planned for some time and is wider than just his chief of staff.
Mr Shearer and Labour previously told media there was nothing happening behind closed doors with staff in the party and the party's policy had been not to talk about staffing matters.
Mr Shearer has appointed his former press secretary Fran Mold as his chief of staff in order to tighten up the political management of his office in time for the election next year.
Asked if the changes had been sparked by bad poll results, Mr Shearer did not answer.
He said there were no firm, or confirmed changes but the changes had been in motion for some time.