How Clive Palmer’s deep pockets are building a yellow, slick road straight through One Nation’s heartland

Analysis: UAP has bought every available billboard space, and has signs on dusty dirt roads in the middle of nowhere

• Guardian Australia's full federal election coverage

Take a wrong turn on the back roads through central Queensland, about 40km from Banana (population 354), and the road turns to gravel. A few clicks further on, over a couple of cattle grids, there's a bright yellow United Australia party sign - but not another driver to see it for miles.

This particular spot is close to smack bang in the middle of the 133,000 sq km electorate of Flynn.