I went to the National Maritime Museum yesterday to see the "images of empire" as recommended by a lecturer in class.

The museum itself was relatively dull (well, for me) but the exhibit on empire was certainly very interesting. There were anti-colonialist video, stories of moving from the empire to Britain, images of events in imperial history (like the treaty of nanking) amongst other things.

It wasn't too critical of empire... but maybe I'm just biased. Nothing ever seems critical enough for me. But I suppose that's to keep people coming to the exhibits and not offended.