Charles I's Death Warrant
A reference I made to an excellent page about the death warrant in my review was removed by IMDB before it was posted (I guess it's against their house rules to include URLs in reviews?), so I'll give the reference here. It's:
https://web.archive.org/web/20081119022141/http://www.parliament.the-stationery-office.co.uk/pa/ld199899/ldparlac/ldrpt66.htm
For anyone who might be interested in the sequence of events in the drawing-up and signing of this document, this is the best page there is on the subject.