@alexmtaylor I'm fairly certain that tresiba also comes in cartridge form, although I could be wrong, so could you ask to be changed onto them, as a short term solution?
I've just checked, and it does.
https://www.evidence.nhs.uk/formula...long-acting-insulins/insulin-degludec/tresiba
Personally, I've never had a problem with the FlexTouch pens, stupid and wasteful as they are (why my DSN is obsessed with them I will never know, I'm on the KwikPen thing for Humalog as well). Definitely fill out the Yellow Card Form, as if enough people report it it is more likely to get sorted in the long run.