Ah, that's where they hide the info :)
Thanks for that, I've just confirmed that I do indeed have Denim. I don't know if it's of any use but just as an FYI, the MS camera doesn't actually appear in the list of apps. I accessed it by going into App Settings > Photos + Camera and changing the default camera app in there. I haven't seen another way to access the MS camera.
Thanks for the confirmation -- you've just reminded me that I tried out the whole "hold down the camera button for video" when my phone first told me I could do that, and I wondered at the time why I didn't have any audio. Now I'm wondering why I didn't investigate further when that happened. Oh well, you live and learn I guess.
I'll be calling Vodafone today... and soon I'll probably be setting up my THIRD 930 in as many weeks :(
UPDATE: I've spoken to Vodafone and a new phone should be in my hands tomorrow. Hopefully it'll be third time lucky. I'll report back once I've tested that one.