Coalition agreements are dragging into their 19th day - but there are expectations a deal could be signed on Thursday.

Just a few outstanding questions remain over ministerial roles - including the deputy prime ministership.

The leaders of National, ACT, and New Zealand First remain in Auckland for now - but National's president Sylvia Wood was spotted at the airport Wednesday morning, as was senior National MP Chris Bishop.

Deputy Political Editor Craig McCulloch spoke to Charlotte Cook.