Also, I just want to say thank you for everyone's advice last week about having family up when this one is born. As the consultant was not hugely confident about actually getting to the scheduled date I think there is no point trying to organise for my sister to come up. Plus, I don't think she had really thought it through- I think she thought she would play with DD for a couple of hours, for a couple of days, and get to sit around cuddling a newborn. When I said that things would be a bit more chaotic and that the baby and I were likely to be in hopsital for several days (meaning at least one whole day for her with DD) she started to mutter about needing to check her annual leave situation! I think it is for the best- i certainly don't want DH to just have an extra person to look after and I think that is what would have happened. I have started rallying from friends who had previously offered to help, plus DD has two days a week with the childminder, so I think we will manage.
The next issue will be people wanting to come up, particularly as it looks like the baby will definitely be here before Easter weekend. In the past both sets of family have been hugely resistant to staying anywhere other than our flat, even when we were in the one bed flat with DD. We can't really afford to put everyone up in hotels, particularly as they would want to stay more than one night given the distance parents and PIL will need to travel. As we are moving much closer 4 weeks later I am very tempted to just say no so that we can spend time with our friends here, pack and generally adjust before the enormous move and DH starting his new job.
However in the past my mother has tended to straightforwardly ignore me so we will see. She surely can't ignore me and still expect me to have her to stay, surely 
When DD was born my mum had already arranged a visit (which I had said no to) because she wanted keep me company while I was on mat leave. As it turned out she came up when DD was about 5 days old. Fortunately a friend was away and let my mum stay in her house. My mum still turned up at about 8 each morning and stayed until 10pm each night. She expected to be able to sit in on my midwife appointments (luckily the MWs seemed to have lots of tricks for getting rid of interfering grannies as she only wanted to ask her own questions, talk about her own experiences etc and generally dominate proceedings).
Worst of all though was that she repeatedly told DH that he was not needed and tried to persuade him to go and stay with an old uni friend to make use of his paternity leave. All I can say is that DH has the patience of a saint because if MIL had done that to me I might have never spoken to her again!
Then my mum decided she wanted all her family around her and came back the following weekend with my father, sister and her boyfriend. I had to find, arrange and book accommodation for them which she was very reluctant to pay for. They ignored the fact I had had a section and was still pretty immobile, bullied us into a day trip because they had 'come all that way', she brought sis's boyfriend into my bedroom when I was breastfeeding topless (I was still learning!) so that he could have a look and insisted that they all stay until 10.30pm the night before DH was starting back at work because there was something they wanted to watch on the tv, despite knowing it took us hours to get bed.
They then came back the following day, cleared me out of easy to make food because they wanted sandwiches and snacks for the journey and left me an exhausted, quivering wreck. And following that visit DD was found to have gained barely any weight (probably because she was not allowed anywhere near my boobs because they had come all that way and were entitled to cuddles) and we were put on a rather stressful weighing schedule.
Sorry for the mega rant- I think I needed to demonstrate that I am not just being mean/ precious! In fact I migh save this somewhere in case I need to strengthen my resolve if they decide they need to do this again.