When I see people complaining about the flaws in Eurus’ plan (i.e. how did she get that fake cell put up, etc.) I find myself laughing because I’m the daughter of an architect. I’m the granddaughter of an architect. I’ve grown up playing with Barbie dolls while on building sites. Architects and builders do not give a shit what they’ve been commissioned to build. They see it in terms of extensions, refurbishments, what walls need to be knocked down, what dimensions can be fitted, etc. etc. What you do with it is your business.
This is probably how the conversation would’ve gone down:
Governor: We need you to build a fake cell at the bottom of the garden, facing the house. You will be paid handsomely for your discretion.
Architect: So, it’s like a studio. What dimensions are the garden?
Builder: I’ve done small bathrooms, I’m cool with anything.
Honestly, the only thing that could’ve stopped Eurus is planning permission.