I don't want to be a tease with info but wanted to see if anyone came out with an unprompted answer, because the extra information points essentially to two very common airliner types. But given no-one has suggested anything likely, this is a holiday charter flight from the UK (either Manchester or Gatwick) in May 1973, and the remainder of the uncropped photo is a shot of the Corfu Runway, the wingtip was actually hidden under the original slide mount when I removed it for cleaning and high res scan. So it's a longish European short haul airliner.
I think it's a leading edge, because the lack of any static dispersal equipment, and the slight hint of something at the nominal trailing edge. This would mean the photo was taken from the front starboard side obviously, though it's not easy to figure out the angles.