Just because I want to post more then one source.
http://www.answers.com/topic/iceni
Slightly different topic. The Celtic Iceni peoples which were Boadicea's clan/tribe. Dax and Blackleaf, though I totally rspect her as a celtic and british hero and would not say she is not one but the other, I still assert she is a celtic hero, to all celtic peoples and ango-saxon British peoples who now live in the area Boadicea and her peoples once lived in. Some Celts may find this laughable because the Saxons from which the British Anglo-saxons come from wiped out many Celtic tribes in the area and pushed them westwards. But I think this is being to mythical with your nationalism. But to assert that celtic peoples should not see her as a celtic hero is absurd.
If you wish to see her as "English" why don't you do even more revision to history and even though christianity was not in this area yet, make her Christian too. Better yet since you guys are anti-catholic why don't you make her church of england too.
Anyhow I'm happy to know most British people are either happy enough in ignorance of her roots just to see her as a hero of the Ancient British People and the Celtic peoples of Ireland (I don't know if Scotland and wales think of her as a hero so I won't lump them in) see her as such as well.