Ard, Ireland lost about 3million in that terrible decade.
All too many were deaths. Many others crossed the Atlantic.
Exact records of how many arrived here were not kept because they were british citizens.
Over the last ten years, almost three quarters of a million British people have left the UK and nearly 2.5 million immigrants have arrived. This rate of inflow is 25 times higher than any previous period of immigration since the Norman Conquest in 1066