Shazzdan, I get what you're saying about kitbash potential, but the boots.....those look nothing like Viking boots to me.
And yes, for all these recent figures -- this Henry V, the Robin Hood, and the Henry VIII -- they are being based on the film/show versions. So while discussions of historical accuracy are fascinating, they are kind of moot in relation to the aim of what the figures based on/trying to convey.
In regards to this figure in particular, if one bears in mind that it's based not only on a miniseries, but also on a Shakespeare play at that, the lack of historical accuracy is much more understandable. Even in Shakespeare's day, it's not as if these historical figures were being portrayed with precise accuracy, either.
Essentially, it's a contemporary take on what was already, in its time, a piece of historical fiction. Not to mention that it is common practice in Shakespeare productions for the costumes to be less than 'accurate'. I remember watching the televised production of Coriolanus, also starring Tom Hiddleston, and that was a play set in Rome, shortly after the expulsion of the Tarquin kings, but was written in the early 1600s, and being portrayed in the 21st century. The costumes in that version were what I can only describe as 'modern fantasy'. And yet, it worked. Because ultimately it's about the artistry of the staging and the overall performance, rather than how 'accurate' it is.