Not entirely convinced of an ID, aspects of the labellum could be parviflora or unifolia.
The plants nearby that are clearly unifolia were basically all finished flowering and going to seed, except for a handful of flowers right at the top of the spike, while this one appears to have only just started flowering.
The large aff alpina form
A few small groups of plants in close proximity
Under Tawa
Totally out of season single bloom.
Nice range of colours
White form
Possibly what is called albaflora in aus
Trackside. Apologies for crap pics...
Trackside bank
Beside track.
Old track access
In the same area as the last two posts...