With excellent photos like these it is easy to see that the sepals cupping the backs of the flowers are hairy. The other species like this, Drosera auriculata, has hairless sepals. It usually has pink flowers. Drosera peltata, to make ir more difficult, is sometimes pink.
Drosera hookeri was described after this sighting was uploaded. Nearly all sightings previously included in Drosera peltata will now be Drosera hookeri. The easiest diagnostic is that hookeri stays green while the basal leaves of peltata turn red. Hookeri is also more robust than peltata and the stems can branch. Peltata has unbranched stems