As I said on the other thread, I don't believe there's anyone who wouldn't be bothered by any anachronism in a period drama - if Queenie was seen knapping a stone axe or George entered on a hoverboard we'd all think something was amiss. People who know an area well (e.g. mummer's plays) are more likely than the rest of us to be bothered by mishandling of that area - I don't think that means those people are hypersensitive humourless pedants.