Next door has changed hands, and they've been having work done. Including having an alarm fitted by a company who has their name on the bell box. And they've fitted that within easy reach of someone climbing up onto the ground floor window sill.
Others in the street are fitted well out of reach without a ladder.
Perhaps it doesn't matter?
I'd love to see the internal wiring to it. It's well below ceiling height, and on a wall which is plaster on brick. Cowboys?