1. You type a yearAdd a town or a region like "North West" or "Seaside", or leave it blank for the whole country.
2. It goes lookingIt searches British Pathé, British Movietone and BFI films, the Internet Archive and Wikimedia Commons for footage from that year and place.
3. It picks the bestWrong years and off-topic clips are thrown out, the rest are put in a running order, with "also this year" facts between films.
4. You watchIt plays like a TV channel. Skip, go back, or jump a year either way. The first time a year is asked for it takes a minute — after that it's instant.