Welcome MrsPeggyPatch and Sedgers. Sorry I can't help with the NCT thing either, as I didn't bother with them in either of my previous pregnancies. I would probably go for the longer one a bit earlier if I was looking to make friends though. I found I made friends by going to groups with the baby, so bf support group, baby massage, baby sensory, etc. I'll be doing the same this time too, and trying to fit in toddler groups for dd2.
Angelico that sound horrible, I hope you feel better soon. I'm not sure but I would have thought light activity would mean you can potter around the house, wander to the local shop, etc, but don't do strenuous exercise, housework, gardening, anything else you don't want to do 
zoep well done for standing up for yourself, you are a grown woman and are capable of making your own decisions. One glass of champagne is hardly going to hurt.
marvellousmarie congrats on your good scan. I wouldn't worry about having sex, I was very demanding in the second trimester last time, so much so that dp complained I was wearing him out, nothing damaged the baby though. Grab it while you can.
CWest I just said I had a hospital appt when I went for my booking appointment, nobody questioned it apart from my friend who very quietly asked if it was a happy appointment. My boss was quite happy just to accept I needed to go, and I think he was quite glad I didn't go into detail about what was wrong.
Kyrria I told my immediate boss (but not my actual employer as yet) after my booking appointment, so it was quite early. I just spoke to him at the end of the day and told him straight. He said "fucking hell, you're not are you? Oh I'm supposed to say congratulations aren't I?" He's taken it quite well actually, better than dp did anyway.
I'm loving the sunshine, except at work. My classroom has to be the stuffiest room in the entire school, we have huge windows that only open the tiniest crack, the blind came down a few weeks ago and the caretaker can't/won't put it back up for me, so it's like a greenhouse. Add in 30 sweaty teenagers and you can imagine the odour
. Once i was home it was lovely though, sat out in the garden eating ice lollies with the kids, then went to the park even though it was bedtime. Brilliant.