Did you watch Epiosde One of A House Through Time and wonder about a couple of the databases that were used on the programme - well wonder no longer
Apart from the usual Find My Past, Ancestry, The National Archives and The British Newspaper Archives David also used - The Slave Voyages - which can be found at https://www.slavevoyages.org/ and referred to the tokens left at the Foundling Museum - there is a great blog on the work of historian John Styles’ in this exhibition https://foundlingmuseum.org.uk/events/threads-of-feeling/
If you fancy tracing the history of your own house and not sure where to start they pop along to http://www.tracemyhouse.com/ where you can find tips and hints galore