In the case of the Daybreak event, how well are your chances retreating to SCP-1678, UnLondon? I know UnLondon was constructed for world's end scenarios as a failsafe area.

Let's say a person is somehow able to not be melted to goo. They somehow find their way to an SCP Foundation site or find their way into UnLondon following an MTF squad. I know there's an SCP outpost in UnLondon. I guess the main question is how long can you survive? Screw the Bobbies, the Wretch entities, and the Piegon drones. How many supplies does the Foundation have in UnLondon and how long can humanity hold out should a group be relocated down there? Wonderfood is fore sure out of the question, buildings are moldy, and water probably doesn't exist in drinkable form.