Did the Romans leave London because of the miserable British weather?
The Daily Mail [UK], 5th November 2011
Their huge empire stretched all the way from northern Britain to the
Egyptian desert. But it seems the all-conquering Romans had an
unexpected Achilles' Heel in the grim British weather. Settlers suffered
from poor health due to a lack of sunlight and a poor diet after they
established Londinium in the 1st century AD, according to scientists.