I'll agree that there is increasing emphasis on reproducibility and _useable_ software in academia. Writing documentation, unit tests etc. is still not really rewarded properly, but at least within the current paradigm such efforts are often rewarded with more users (and therefore citations) which is rewarded. Soon, hopefully, it'll be recognised more directly.

Also, I'm currently a postdoc in medical imaging at UCL, super interested in learning a little more about the group in Oxford you mentioned if you're OK with sharing a link/group name? I may be able to guess but just want to check!