It is a Christmas Tradition that all the Major Networks abide by and thus we are deluged with a lot of tosh and many repeats, this has happened for as many years as I remember and some networks stick so hard to the rules that they forget to include programmes associated with Christmas.
Crap Christmas Television is a proud National Tradition and long may it survive as we need something to hand down to the future generations, where else could you see such a crap classic as Dad's Army on a Bank Holiday.