Syon Park is a popular filming location and its distinctive settings appear in multiple Poirot episodes: most dramatically, perhaps, in The Labours of Hercules, where the classical imagery of the setting lends itself nicely to the plot…
The Great Conservatory and the fountain statue of Mercury.
…and also in The Big Four, where the Great Hall is used for the chess tournament.
Did you notice that Syon Park is also used for certain shots in Thirteen at Dinner, the 1985 Poirot film with Peter Ustinov? The dinner itself takes place in the Great Hall.
The property is supposed to be Sir Montagu Corner’s residence, so we also see a number of other shots of the area, like the Long Gallery…
…and various shots of the outside of the house.
Seven Storeys High 