Think most things had yellow prop tips in those days. The there was a phase where there was a move to increase visibility with black and white stripes IIRC.
Where was the Viscount heading to - seem to remember those mostly parked nose out in those days. Vintage ATCO will know- was stand 8 also generally nose out with 7 being the last nose in one?
I guess the photo was around 1970, possibly 71 with the mix of aircraft there - the Court Line One Eleven looks short enough to be a 400 in which case good old 'BL again and 1970.