Trying out the embed:
Using latest UV:
<iframe src="https://uv-v4.netlify.app/uv.html#?manifest=https://librarysearch.cardiff.ac.uk/view/iiif/presentation/44WHELF_CAR/12206137520002420/manifest&c=0&m=0&cv=1&config=&locales=en-GB:English (GB),cy-GB:Cymraeg,fr-FR:Français (FR),pl-PL:Polski,sv-SE:Svenska&xywh=-348,0,4324,5620&r=0" width="560" height="420" allowfullscreen frameborder="0"></iframe>Version from Alma
Also testing uv3