No night checks for me (lambing outside). Unless one has already gone into labour then I will wait up...maybe...depending on how tired i am!
If we have one lambing last thing and there's any possibility there could be any problem, BH lambs them himself so that he can make sure everything is ok and not lose sleep. At first I found this hard to take, preferring always to let the girls do what comes naturally as far as possible, but after several years lambing hundreds of ewes over a period of many weeks, sometimes months (we don't go for a concentrated lambing, and usually have a few earlies, then the main flock, then the first-timers, so it can go on for a couple of months or more), I have come to understand that occasionally it makes sense to do what may be slightly less than optimum for this one ewe or lamb but which overall results in a better rested, more competent and able farmer for the rest of the flock.
It won't be the right thing for every sheepkeeper, but for us with several hundred ewes (and cattle calving at the same time, some of them) and a protracted lambing time, it is sometimes the best thing to do.
Almost all ours lamb outdoors. If really horrid weather is expected, we'll bring in any that look imminent. If they aren't getting on with it before we go to bed, they'll be left till first light. If they are showing a bleb, or are further along than that, they'll be lambed before we go to bed.