The Independent piece here describes it as being "as bad as the Great Frost of 1709".
I'd never heard of the great frost of 1709 before, so had to do a bit of digging. I have previously taught about the Little Ice Age, and have an excellent book on that period.
It was apparently also known as the Great Winter in this National Geographic piece.
❄️The Great Frost of 1709❄️— BC (@mildthing99) November 20, 2020
A symptom of the #MaunderMinimum?
A good time to consider the extent to which many images of Christmas time are rooted in folk memories of the #LittleIceAge? #ClimateChange #SolarCycle #Sunspots #DaltonMinimum
Ref @GeoBlogshttps://t.co/Fi21TjpSQb pic.twitter.com/vTaIbOO5Eb