I had to move some of mine into the greenhouse overnight a few times in the last couple of weeks and decided this morning they are staying put in there until the come into the house (which will be soon). 46F overnight last night and not much warmer as I left for work so I didn't want to move them back out.
The Phals, Den Phals, Paphs, Phrags and a few others are indoors all year anyway. But the Oncidiums, Maxallaria, Restrepia and the various mounts will have to come in from the greenhouse soon as I'm not heating the greenhouse by more than a couple of degrees at this time of year, so really just guarding against wind-chill and unexpected frost (we've already had one light one in other parts of the UK).
The Masdies and the Cymbidium will stay in the greenhouse all winter with a min of 40F being maintained. The Cyps will probably have their tubs moved in there as well, or I might just cover them and leave them outside in a sheltered spot.
It's that time of year that I've been planning and thinking about where everything will go. Doesn't seem long since I was putting them out