You're not very communicative, are you? I thought you wanted our help & despite my nick I can't see inside your home.
How many such boxes are there in the whole place? Don't you keep
separate circuits for lighting and power circuits (called a ring main here) there? Is the bell on a lighting circuit?
It really does sound a mess, but you are not helping by not explaining

.
I really think this thread needs closing; it's going round in circles (or circuits

).
1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 20 Meg WBC