Officers searching for missing Lewis Pearce have today released a further CCTV image of him.
The image is from a camera at London Waterloo railway station, and was captured just after 11pm on Sunday 1 August.
As you can see, Lewis, 19, is still wearing the same grey tracksuit and coat in this image as in a previously released image.
He is also walking with a woman.
Lewis has been missing since getting on a train to Poole at Southampton Central railway station around 7.25pm on Saturday 31 July.
When he arrived at the railway station, Lewis was seen talking to two blonde women outside and then again on the train.
If you have seen Lewis or have any information about his whereabouts, then please call 101, quoting the reference 44210306208.
Police also want to identify and speak with the woman in this photo, as she may hold important information that could help us find Lewis.
If you wish, you can also call Crimestoppers anonymously on 0800 555 111.
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