Imagine a Tory Prime Minister stepping down after nearly ten years at the top on his own terms. The budget was back in surplus, troublesome referendum results had been quickly forgotten, and the PM still remained overwhelmingly popular, with his party still sitting on around 50 per cent in the polls. No, it's not the restless dreams of David Cameron, but John Key - New Zealand's soon-to-be ex-PM, who unexpectedly announced his resignation earlier today.
Arguably one of the most successful centre-right leaders in the world since Margaret Thatcher, Key has dominated New Zealand politics for the past decade. His National party has held near-majority government, despite a proportional electoral system that was meant to make such a situation impossible.