Last month DYA reported that data website TheGenealogist had released new, higher resolution scans for the 1851, 1861 and 1871 censuses for England and Wales, adding to an upgraded set already available for 1891. These original page images are a major resource for family historians and we wanted to know more about the technology behind it all. So we spoke to TheGenealogist’s head of online development, Mark Bayley: