Police say they are are growing increasingly concerned about Josh Thomas who was last seen by a friend outside the City Wall pub in Rochester last Wednesday.
The 18 year-old is seen walking on the city's bridge bridge just before 1am when a black hatchback is seen stopped next to him.
Kent police say the car drives off, then reverses back for the person or persons in the car to talk again to the young soldier.
The last image shows Josh who is from Neath on a traffic island outside the Crown pub.
His family are due to travel to Kent on Thursday to help with the search
More top news
A tidal lagoon between Cardiff and Newport is being planned as part of a report published today.
A RNLI crew member has spent four weeks repairing and renovating two historic relics which are to be displayed at a new RNLI station.
GPs will have more time to spend caring for those most vulnerable with complex care needs, under a new contract.