I thought La Senza was shut? The company went bust ages ago, but I don't know if somewhere else bought them and kept some of the shops on or not - one of my standby plain black work bras that I always reach for in a hurry was from there and when I found out it was closing they had the sets of it with pants in a few different colours for ?18 so I bought one of each
. I used to wear more expensive stuff for bookings (and still do when I think it'll be appreciated) but they fit great, admittedly with a little overspill - I'm a 34G or a 32GG depending on the shop/make.
If you've got money to throw about, Buttress and Snatch will custom-build them up to a J cup. Otherwise I concur on Simply Be or Simply Yours or whichever it is. If you're quite handy with a sewing machine you can buy ones with the body strap far too big and take them in at the back (a 40DD has the same size cups as a 34FF) which isn't quite good enough for general wear, but they'll do for work or photos.
Has anybody investigated the Kelly Brook ones at New Look? A lady I know told me that they go up to an F, so not enough for me but they did look pretty when I walked past them in the shop.