The 53-year-old was reported missing shortly after 6pm this evening (12 July).
Police are concerned for Mark’s welfare and ask anyone who has seen him to get in touch with us.
If you live in Eastleigh or the surrounding areas, then please help us by sharing this appeal.
Mark is described as:
• 5ft 9ins tall
• Medium build
• Grey hair
• Thin rimmed glasses
He may be wearing a blue T-shirt with an England flag on the front, blue jeans, and navy blue and white trainers.
If you have seen him, or know where he is, please call police on 101, quoting 44190243616.