Police are warning the public not to approach a man from a secure mental health unit who disappeared on a day trip to a Buddhist monastery.
Malcolm Millman, 58, was being detained at Chadwick Lodge, a medium secure facility in Eaglestone.
He disappeared at 2pm on Saturday during a day out to St Margaret’s Amaravati Buddhist monastery near Hemel Hempstead.
Mr Millman was spotted two days later at Manchester Airport around 12.30pm on Monday but police do not think he has access to a passport.
Officers have warned members of the public not to approach him and call 999.
He is described as white of large build, bald with thinning brown hair on the sides, and brown eyes.
Mr Millman was last seen wearing a brown jacket, purple jumper, grey tracksuit bottoms and blue and white trainers.
He was also carrying a walking stick.
Mr Millman is also known by the names Richard Simon Barber, Michael Geoffrey Newman, and Raymond Pilkington.
Superintendent Olly Wright said: “Thames Valley Police is working closely with other police forces and organisations to locate Malcolm Millman as soon as possible.”
He added; “If any member of the public sees Millman do not approach him, instead call 999. If you are reading this and have any information whatsoever about Millman’s whereabouts then please call police via 101.
Anybody reluctant to speak directly to police can contact the independent charity Crimestoppers anonymously on 0800 555 111 or online at www.crimestoppers-uk.org.
No personal details are taken and information is not traced or recorded.