I did the Introduction to Humanities OU course, this is what I remember of those subjects from it:
French Revolution and Rousseau, the Colosseum, counter-culture in the 60s, Darwin
Wide Sargasso Sea, Pygmalion, Medea
Poetry - sonnets, Shakespeare, Heaney, Milton, Clare, Rossetti, Harrison
I also studied European History, Scottish History and English Literature for 2 years at uni. Early history focused on the church structure and society and relations with non-xtian peoples and each other. Lit was concentrated on the main 'movements' - romantic, victorian, etc. Off the top of my head some of the reading was Austen (Emma), Shakespeare (Much Ado, Hamlet), Milton (Paradise Lost), Pinter (The Homecoming), Bronte (Jane Eyre), Fitzgerald (Great Gatsby), Carter (Magic Toyshop). Can't think of any more at the moment, sorry!
I have found that courses within an institution will be as inclusive as possible - every lecture links to something else that you'll be doing in another subject. So, for example, studying the French Revolution brought in the theories of Rousseau and the social contract, the art of David, etc. I would recommend that if you're doing your own work beforehand then concentrate on one period of history and throw yourself into it - read the capital H History, social history, the legal system, economics, education, religion, language, literature (obviously!) science, fashion, everything you can get access to.
hth
good luck!