Yes, I’ve watched Merlin BBC. No, I don’t particularly like it. Its incoherencies, racism, sexism, plot devices, OOC characters irritate me. Still, I’ve watched all the seasons two times and I’ve wrote some comments. You can find them here.
Said that: I really love Gwen of Merlin BBC. And I started to ship Gwaine/Perceval after the last episode which, a part from the anticlimatic battles, was really well done.
I wish I could study arthurian legends academically but it’s not an option in my country D:
No, Morgana le Fay is not Mordred’s mother, The first text where Morgana is Mordred’s mother is C. J. Riethmüller’s Launcelot of the Lake (1848). 1848 is not really an ancient source. Mordred appears first with Anne as his mother and Gawain as his brother. Morgause name is actually Anne Morgause.
No, there is no explanation (historical or not) for Bedivere as an ancient Lancelot. Lancelot is a character created by Chretien de Troyes and Bedivere is Bedwyr in previous Welsh texts. They are two different characters.
I know Mordred/Galahad makes no sense. But it’s still my OTP.
I despise Merlin and Lancelot. They bore me so much that I try to avoid them as much as I can.
When I say “in that version of arthurian legend is canon that-” I mean ancient texts. It can be from Malory to Monmouth but I don’t consider modern novels canon. As much as I love modern novels they are like these wonderful fanfictions (with better writing) that are waiting to be read.
Usually I use Malory’s version of the legends because it is the most well known and the one which I prefer. (I love Monmouth but it has a lot less characters and episodes).