Six million people died during the Holocaust. Probably many more died because of the British Empire's policies. The biggest causes of this was probably the policies of the British Empire that caused famines (by letting British landowners export food while the native population starves) and the British stoking of ethnic conflict in a strategy of “divide and conquer”. Two examples of this was the series of Indian famines in the late 19th century and of course the Great Famine in Ireland.
Examples of the latter are probably too many to mention. Should wars basically caused by the British (between native populations) not also be counted?
There are however other cases where the British simply killed people in concentration camps (by destroying the rural areas through a scorched earth policy and imprisoning the civilian population in camps and denying them food, e.g. http://en.wikipedia.org/wiki/File:LizzieVanZyl.jpg).
> Also, the British Empire, whilst causing harm, did bring benefits to some countries (something it would be hard to argue the Third Reich did).
The benefits that you mentioned was simply benefits of an industrial society. The general population in the victim countries did not share in the advantages of it, yet they paid for it (with their natural resources and the sweat of their brow).
In general not all people were allowed the benefits of education. The Catholic Irish were for long prevented from obtaining an education. In countries such as Sri Lanka, a ruling class was imported who received education. The aim of this was simple – to benefit Britain (not the local population). For Britain to develop to a high level at that time, required the work of many people in colonies (out of sight and out of mind) that was screwed in the deal.
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Probably the worst thing that the British Empire did was large scale ethnocide (destruction of indigeneous cultures and forcing native populations to use English).
But yeah. At least the Germans owned up and agreed that the 15 years of the German Reich was a mistake (and abandoned the symbolism and nationalistic tendencies). People in Britain still live with the mindset that colonialism and their colonial empire was a good thing.