Been in touch with the hosts who have been very good and answered all my questions and slight concerns. They assured me the iron gate at the front of the apartment door doesn’t have to be closed at night, and it is only there as a security guard because the apartment is empty when it isn’t being let out. The same with the window bars as the apartment is on the ground floor. The main door into the apartment block is a normal door. The second floor with the living accommodation doesn’t have bars on the windows.