It certainly isn't my intent to disappoint.  I will be adding a disclaimer to the comics to avoid any further confusion.  I hope that the scene was believable because 1. You wanted to believe it was real, and 2. Because it felt believable.  But this is all fiction.  In the way that the mafia is a real organization, but Tony Soprano is a fictional character.  Or, the film Almost Famous is inspired by Cameron Crowe's real life journey as a young rock journalist, but Stillwater was never a real band.  In some Hollywood movies, worlds blend together.  The scene in the Ocean's 11 remake when Brad Pitt's character, Rusty, teaches poker to actual celebrities playing themselves (eg: Holly Marie Combs, Joshua Jackson, etc.) comes to mind.  I considered trying to blend different elements like those just mentioned, but ultimately chose to imagine every aspect of this story.

Again, sorry to disappoint, I hope you will continue following the series.  And if it's any comfort, nobody probably wishes a scene like "Chattingham Manor" existed more than me!