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I've patched up the colours to make it more consistent and appealing. I've also changed the structure so it's no longer a whole string of table rows; instead it is now a series of lists (which is far more appropriate).
Further changed it to medieval to accord with (1) Wikipedia's other articles (including those about Britain), and (2) the fact that the latter spelling is used on ten times as many UK pages as the former, which I think is more than enough to warrant change!