Edited revised plan: baby up at six, perfectly happy bath, screaming meltdown when removed from the bath, dress baby, weep internally as baby cries so hard she's a little bit sick on her freshly washed neck, feed, and into bed by seven. In other words: not such a great bedtime as yesterday.
Then I rang my sister, and when the baby started crying a few minutes later, she said to wait ten minutes before going up. After nine minutes, she stopped. Twenty minutes later, crying again, stopped after two minutes. Half an hour later, cried again, stopped after thirty seconds. Now all quiet, and she is presumably asleep. I am under strict instructions not to cave before ten minutes, and even then, just to go up, check nappy, temperature, arm-flailings, dummy, etc, and if everything's fine, shush her a bit without talking to her, and then leave the room, and see if she's still crying in ten more minutes. Persistence will be required. I hope this works, because ten whole minutes is hard.
leni -get the visitors to make you cups of tea. You had a baby less than a month ago, you're officially still recuperating and mustn't over-exert yourself. 