jigsaw puzzle 1000 pieces size (Deaconsbank G46)

Used jigsaw have made it up to find 1 piece missing. Aargh. It is called the Road to Dunkirk. The approx size of the jigsaw is 27 inches x 19 inches or 69 cms x 48 cms. If I find the missing piece I promise to send it on. Not sure if someone could perhaps make the missing piece. Collection from Deaconsbank G46 8UB in Glasgow.
The picture shown is the actual jigsaw made up (apart from 1 missing in action piece). The make is Gibsons. The box is included plus some pictures and paper copies of the puzzle.