Just come back from my booking appointment. My midwife was lovely and very enthusiastic about using our local birth centre (Lewisham) but unfortunately my BMI is 1 point over the cut off, at 36. So it seems I can't use the centre, unless I manage to lose weight, which seems unlikely. She's going to chat to the manager there and see what they say but otherwise we'll have to see what the situation is further down the line i.e. if my BMI drops.
I don't want to try to lose weight but will definitely try to eat more healthily... in between bouts of nausea 
Has anyone else experienced this? I'm wondering whether the "policy" rules are set in stone or whether we can sweet talk anyone? Really keen on having a water birth.
Thanks.