leaving aside the electrical considerations, pushing the boxes into the wall brickwork cavity could lead to a bridge for outside moisture to permeate the inner wall.
electrically, are they spurs off the ring? if so, better to pull them back to the ring break-in junction and remove completely. or, replace fuse spur faceplate with a blank faceplate and leave well alone (hang a picture in front)
leaving aside the electrical considerations, pushing the boxes into the wall brickwork cavity could lead to a bridge for outside moisture to permeate the inner wall.
electrically, are they spurs off the ring? if so, better to pull them back to the ring break-in junction and remove completely. or, replace fuse spur faceplate with a blank faceplate and leave well alone (hang a picture in front)