we are shortly moving into my parents old house, me and my partner have renovated the property over the last 18 months, we are now nearing completion, but have a problem with lighting on the stairway, there is a light just inside the front door with a double switch, upstairs on the landing is another light with a single switch, im 90% sure that the double switch downstairs has not been removed at anytime during the work, but the upstairs switch has, I replaced the upstairs switch and it turns the upstairs light on and off, but the downstairs double switch will only operate the downstairs light on and off, pic 1 is the wiring on the double downstairs, pic 2 is the upstairs switch wiring and pic 3 is the upstairs ceiling rose, any help to whats wrong would be very welcome, thanks in advance