It's actually a nifty product, and is a snap to use: http://www.archersoftware.co.uk/satlas01.htm. Most recently updated in 2015, and will run on most any PC, even on discontinued XP and Windows Vista (I think).
It's a good/bad situation. The UK has conducted far fewer censuses than the US where we've been pretty much clockwork every 10 years (not really very informative until 1850, of course; and not counting the 1890 disaster). But I've never seen the same type of detailed population/surname mapping for each of the US censuses...perhaps because of the sheer volume and the dynamic shifting of county--even state--boundaries from census to census.
But the 1881 census in Britain has been analyzed and mapped backwards and forwards. Vital if you're studying families there. Ancestry.com offers searchable data for the 1881 census, but I'm not convinced its heat-map charting of surnames is as detailed as the Archer product.
