Well, Britain and much of Europe was under an ice cap during the last ice age that ended 8000 years ago. The start of the last ice age was rather quick from a c

Well, Britain and much of Europe was under an ice cap during the last ice age that ended 8000 years ago. The start of the last ice age was rather quick from a couple of months to a decade some say. It only needs a change of the gulf stream like a massive melt of Greenland and one could start like when Lake Agassiz leaked.