Christmas 2019 Puzzle

I've traditionally put up a puzzle of some description on Christmas Eve for my puzzling mates around the world to amuse themselves with - I didn't really have much time to come up with a good puzzle this year, so I've made a hard one instead. 

It's a bit of a developmenet of the ideas in last year's puzzle, which not many people liked. 

I expect even fewer will like this year's puzzle... 

But hey, there are going to be two prizes again! 

One for the first correct entry I receive and a second for a random entry received before 2020 reaches these shores. 

<Having said all of that, you should be able to find enough clues in there to confirm that you're doing the right thing and even what you're after.>

Wishing you and yours a wonderful Christmas and a fantastic start to 2020!

allard