About time too, what were they waiting for exactly?
The previous countdowns to both 29th March and 31st October began counting down from approximately 100 days if I recall. Ironic that they seemed keener to count down to the UK's proposed departure date from the EU when there was an element of doubt in the run up to those previous two dates yet when there is cast iron certainty the nation will finally Brexit for real on 31st January they dragged their heels on the re-introduction of the countdown clock.
(Not that it's that important)
I look forward to seeing just how the night of 31st January will be treated on screen and the tone that will be adopted.
Happy New Year & Decade TV Forumites!