David McBride was left in a car as a two-week-old infant in January 1962, while Helen Ward was left in a tartan bag in a telephone box in Dundalk in 1968.
Simon Jeffery was left in a box outside a railway tavern in Greenhithe, a story which hit the headlines but which he only learned about by chance at the age of 10. Fi Beazer was discovered in a public toilet in Warminster when she was only a few hours old. Both have spent their adult life trying to track down their parents, and submit DNA samples in the hope of finally getting the answers they seek.