An email alert from DVSA advises that they are introducing 23 new CGI clips to the Theory Test, which feature adverse weather and lighting conditions.
These are effective immediately for car tests, and will be introduced for the other tests at a later date.
I would assume that the various apps will also include test samples in the near future.
If you follow the link in that email, you can see samples of the clips. I think they look excellent – although I’m not sure I would drive quite so fast as that car in the snow clip is doing (you’d definitely skid in those conditions if you braked hard for a deer).
My only other comment is that I wish we got snow like that when it does snow. My experience is more on the lines of horrible slushy stuff that leaves black crap all over your car. Those clips are very realistic otherwise, though.