I finally found a padded UK bra I actually like, the print is super cute too, modern but a bit retro. The fit is quite similar to a Polish half cup, full review and comparison on my blog. I only have a couple minor issues with it, the gore is a bit wide, but still manageable, and the straps are only half adjustable and while very thin, they are sturdy not super stretchy.
Overall fits meh, especially the center gore, especially the left wire, pushes into my sternum and it hurts. Not sure if it's an individual bra problem tho. (Edit: yeah, got another 32DD in this bra, it is an individual product problem.) The straps are longer than the 30E one so it doesn't dig into my shoulders anymore. The band is on the bigger side for me, although could be doable because of the stiffness of the wires and the band, but unfortunately it still rides up too much for me.