I have noticed from Google maps, that half of the Charlton Centre (although not the Blockbuster shop) next to the doctors seems to be a separate building.
http://goo.gl/maps/vHW0z
I suggest that it should be knocked down. A nice piece of town centre land for possible residential development?
(Are Sainsbury's still paying the owners?)
Or at least the owners should be made to repair the forever-leaking roof!