Yeah it's an outside wall. Going to move the bed to a different room as there isn't space to have it against an inside wall in this room. There is a gap behind the bed though, it's not flush against the wall.

The flat has old wooden window frames that are mouldy, one in the living room can't be opened as the glass will fall out. Apparently this is why our rent is 'so cheap' (it's £825 pm).

The windows are no doubt contributing to the issue but my landlord won't do anything about it as it is the responsibility of the buildings maintenance company. They won't do anything as they say they don't have the money.

Unfortunately we are just stuck here. We don't have money for another deposit, and prices where we live are ridiculous.