Typically, Doctor Who's Daleks are pretty disgusting with their helmets removed. It's a refreshing change of pace to see a bearable one...even if the smell is still pretty bad.
I know you're wanting answers for the who, what, when, and where this was taken, and frankly, I can give none. Google came up dry, and every link I clicked led to Tumblr and Reddit, so if you know this mystery baby, let us know below! Super cute cosplay!