Alistair Moffat's conclussion that Arthur was probably of the Votadini/Gododdin is the same as Steve Blake's. After all, the poem Y Gododdin is probably the earliest mention of him. The only difference is that Steve and Scott Llyod's research questions where the Votadini/Gododdin kingdom was and where the battle of Catreath happened. (I know there are some in Scotland who argue that Artorius is the bases of Arthur, but it hardly seems likely that a prince of the Scotti is going to become a hero of the Britons). I think the more research that goes in to who and where the Votadini were the closer we'll get to an answer... if that's possible.
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