At the end of the episode modern Ducky is seen standing side by side with younger Ducky and it is clear that the actor playing the younger Ducky is quite a bit shorter than the current Ducky.
Thou much older, Ducky doesn't seem to suffer from the back issues that would cause that much loss of height.
About 20 minutes in, Emily's hair varies position, it hangs down her back, over one shoulder, over the other shoulder.
Ducky's mother would pronounce "patronising" as pat-ronising, not payt-ronising.