The following websites may be of use if you have a friend or relative who has gone missing. They may also be of help if you are a missing person and require advice on how to make contact with your family or who you can turn to for advice.
Contact details for all UK police forces.
General advice on what to do if you are concerned that someone has gone missing.
Missing People is an independent charity providing a lifeline when someone disappears. It provides support for those left behind, as well as those who have gone missing but wish to seek help with getting in touch with family or are in need of advice.
Lucie Blackman Trust helps families of people missing overseas, as well as assisting in homicides overseas, accidental death overseas, abduction and hostage cases, as well as other crises that befall British Citizens travelling overseas.