The 13th is a while ago but I live here and keep an eye on charts, around that time a Driveclub PS4 bundle was outselling the XBO console at our largest supermarket Tesco.
The Amazon Chart for the week is here http://www.amazon.co.uk/gp/bestsellers/2014-12-15/videogames/ref=zg_bs_tab_t_bsar#4 but XBO didn't make the top 100 so it's hard to tell.
This all pretty unsubstantial but more info would be great to confirm or dispel my suspicions.
Buying order: Switch, better pc