A father and son have been missing for more than three weeks after last being seen in Bletchley.
39-year-old Steven Allen, and his son Alexander Allen, six, were last seen in Newton Road, on 6 October.
Police are concerned for their whereabouts due to the fact that their family and friends have not heard from them since then which is out of character.
It is thought that the father and son may be in Kilburn, North London.
Mr Allen is white, 5ft 7ins, with short black hair. He usually has a moustache and beard.
Alexander is white, 3ft 9ins, with blonde-brown hair and blue eyes.
If anyone has any information about their whereabouts, call Thames Valley Police 24-hour enquiry line via 101, quoting URN 40 of 27/10.
If you do not wish to speak directly to the police then you can contact Crimestoppers, anonymously ,on 0800 555 111 or online at www.crimestoppers-uk.org No personal details are taken, information is not traced or recorded and you will not go to court.