(Click images to enlarge)
I believe it is a Hepialid but the significant difference I noticed between this one and other Hepialids such as the one below are the 'knickerbockers'! Much more dense upper leg cover (which makes me wonder if it is a Hepialid, actually.) Quite a nice moth. It had an orangy coloured hindwing which is visible in the photo.
UPDATE: Oxycanus (could be rosaceous; rufescens or sirpus)
After some rain last night, (5.5mm in total) this species of Hepialid was active. I saw 3. About 4cm in length, it had a greyish hindwing. Probably another Oxycanus sp.
UPDATE: Could be Oxycanus antipoda
This moth was quite pretty. Approximately 3cm in length. No idea what it is, but I'm about to trundle off to see if I can find out.
Update: Thanks to Duncan's very good Moth Gallery, I think this one is probably Crypsiphona ocultaria. (Geometridae - sub-family Geometrinae) I missed it fly off so was unable to observe the undercarriage which is strikingly coloured. Black and crimson on white.