I'm back and struggling!!!
I have finally received my replacement Panache Sophie Nursing bras in sizes 28G and FF and 30G and FF. The 30s are definitely too big in this style (my measurement is 30.5 so, in theory, it should fit) and the 28 feels very snug but I can put it on back to front and pull it around etc but it doesn't ride up when I lift my arms, so all good.
However, I think the G is too small, despite trying the 28GG and finding it a bit big - it seemed to wrinkle up under the cup iirc and wouldn't hold the scoopage and the straps needed tightening up. On this one, if I scoop, it stays, but I get a clevage to proud of and the gore is so far away from my chest, I'm almost mono-boobed... If I look side on, I have slight quad-boob. If I don't scoop, it doesn't look too bad initially, and isn't squashing my boobs much (I measure round the same upright with and without bra), but then I have unsightly bulges I the armpit area!!
I have tried every size from 28FF to 28HH, and NONE of them have fit properly. I have a few cheaper/crappy 34F bras that don't fit properly either, but I don't want to buy new ones that don't fit!!!
Other than sending them back and trying to 28GG again, I don't know what to do.
I don't have a Bravissimo near here unfortunately - the nearest decent bra shop is Rigby and Peller (although there is John Lewis and HoF, but I don't expect them to have many 30FF or similar, let alone nursing bras). I am so tempted to jus go to R&P and just get a fitted bra, any bra, doesn't have to be a nursing one, just so I have a cleavage and support and don't look like I have an inflatable ring around my chest :( 
If I give my measurements, could someone advise me? I am 30.5 around and 39 dangling (37 if stood upright).
I'm looking for nursing bras really, as I want to keep feeding DS until he's a year, but if I could get a supportive, decent, well-fitting bra that gave me a decent shape, then I'm sure I could work around the lack of clips, maybe 
TIA :)