Sundial in BBC series

[Thibaud Taudin Chabot]

Yesterday (sunday) I saw the first  part of the new BBC serie "The 
story of measurement" on BBC4.
In it was a horizontal sundial of questionabvle design. The style 
foot was situated on the XII mark and the shadow was crossing many hourlines.
I can't imagine that BBC didn't do any serious research and used a 
fancy sundial and even didn't notice that the shadows weren't 
matching the hourlines.
Or did my TV having troubles? You never know in this digital era.
Thibaud
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