The auction begins at 12.00 GMT and normally takes 2-3 hours to complete

There’s also a decent size option expiry at 0.7710 which may come into play around that time too

As Eamonn pointed out here the last auction produced a price gain +2.4% against the trend for much of last year so this one will be keenly awaited

GDT auctions 2014

GDT auctions 2014

NZDUSD currently 0.7738 with offers around 0.7750 capping the earlier rally

More details at the GDT site here