Ffordd Pen Llech in the Welsh resort of Harlech dethroned Dunedin's Baldwin St as the world's steepest street in July this year.
But Dunedin surveyor Toby Stoff soon raised issues with the methodology, as the record setting bid was measured on the inside verge of a curve greatly exaggerating its steepness and disadvantaging Baldwin St - which is straight.
The light-hearted back-and-forth between Dunedin and Harlech's most strident supporters is now headed to the UK reality television courtroom of Judge Rinder.
Mr Stoff will be representing the people of Dunedin and spoke to RNZ's Otago-Southland reporter Timothy Brown this week about his plans for the case.