Great British Bake Off data visualization

Anna Powell-Smith (@darkgreener on Twitter) kindly let me (Mark Longair - @mhl20) adapt her D3.js code from The Story of the Season to display this data that I have been collecting on the Great British Bake Off for 2016 and 2017. Many thanks to her - any bugs you see have almost certainly been introduced by me.

There are two scoring systems I'm using here: "Technical" and "Subjective". Here is some explanation of these:

Technical: purely based on the position in which people come in the technical challenge, accumlated over all weeks so far. The person who comes first in the technical gets 12 points, the person who is second gets 11, etc. These are summed, week on week, so if someone's in position 1 for multiple weeks, it doesn't mean they came first in the technical in every one of those weeks, just that the total of their technical scores in all weeks so far had been higher than anyone else's.
Subjective: these scores also include my subjective scores for the signature and showstopper challenges, based on what Paul and Mary/Prue said about them. Again, these are cumulative, but I've also applied a decay to the older scores before they're incorporated into the sum (basically scores have a half life of 5 weeks). This is to take account of the fact that people's performance really does change over the course of the competition, so I think it makes sense to discount the early rounds somewhat.

Great British Bake Off