I recently talked about how I had been looking into getting a strapless bra, after realizing that they have the advantage of a deep band and longer straps, which can be used several ways. I also discovered where I could get a 40A.
Body Soft™ Wired Strapless Bra A-E | M&S AU (marksandspencer.com)I've only had a brief try on so far, but I'm pretty happy with my purchase. Unfortunately the cups run a little large; I also have a 40B t-shirt bra which actually fits better, but never mind. I was really happy to see that the band is a full 3" deep at the hooks, of which there are four rows.
The lace layer over the band is extremely soft to touch, and quite pretty in my opinion. I also bought a 3-pack of matching high leg Brazilian briefs.
Crappy photos, but anyways: