Best:
No 5) 2008/09 Not the coldest but some good snowy spells, especially in early January.
No 4) 2012/13 A back-loaded winter but good, powdery snow at times in January. Cold February and v cold March.
No 3 ) 2010/11 The December to remember. Shame it was mostly all over by January though.
No 2 ) 1995/96 Good cold spells in December and February. Also followed by a chilly spring.
No 1 ) 2009/10 Fantastic cold snowy spells in all three months. Best spell was early January, but February had some good snow too.
Worst:
No 5 ) 1997/98 Don't remember much in the way of cold except early and mid December spells. Mild and unsettled during the festive period, very warm in February.
No 4 ) 2018/19 Forgettable, with little cold weather.
No 3 )1998/99 Stormy at times over the festive period and often mild.
No 2 ) 2015/16 Mild damp winter, not much snow, some incredible warmth during December.
No 1 ) 2013/14 Wind wind wind. Mild mild mild. Wet wet wet. Awful awful awful. Hope I never see a repeat of that again.
Of course, this is based entirely on my own biased preferences. Others' opinions may well differ.