I have just removed a gas fire off a chimney breast and I am left with a letterbox shaped hole. I do not want to replace with any sort of fire (central htg is sufficient for the room). The fire was set off-centre to the chimney breast as it shares the cavity for the flue with next doors fire (also offset). What options do I have? I thought about simply screwing a sliding vent over the hole thereby keeping ventilation possible. As I want to paint the chimney breast I don't think bricking and plastering the hole is an option without replastering all the breast (and capping the vent) . If I put a false surround in that too would ned to be offset. Any suggestions/design ideas??