I actually managed to confuse myself (and you). The 2016 Christmas episodes aren't masterclasses -- they're Christmas-themed competitions with four former contestants in each. No losers, just one winner.

I have two of the earlier Christmas masterclasses, and one Easter one. I think there are two more Christmas ones out there that I haven't been able to find copies of anywhere. I'd buy them from the BBC site, but apparently that's not an option for non-UK people.