Cassell's Companion to Twentieth Century Britain by Pat Thane
Covers the period from 1900 to the age of Blair and New Labour. Its 750+ entries not only deal with key political, diplomatic and military events and developments but also provide in-depth coverage of economic, social and cultural matters. As well as offering a plethora of briefer factual entries delivering biographical data, defining essential terms and outlining key legislation, the dictionary also delivers a number of longer thematic articles treating important aspects of the period in question.