User blog comment:Dryuuu/People a'hangin'!/@comment-4190137-20120914094904/@comment-5498755-20120915084059

It is said that both Merlin and Arthur shot scenes that they were crying in and it had to do directly with the hangings.

I know for sure the the blonde is Eira (Erin Richards) but I have not found anything about the second lady.

"A structure was built in the courtyard, for a hanging. A blonde  woman who looked defiant and a brunette  one who walked with a limp and looked innocent were forced up onto the scaffolding to be hung. These scenes were apparently being filmed for two different episodes www.tv.com/shows/merlin/forums/series-5-spoilers-thread-90585-3342857 ."

And just to confirm the final block of filming ended Sept 13th it was a 3 day filming session.