There are thousands of people missing in the UK at any one time - and many of them having worried family members and friends desperately searching for them.
Missing People offers support to those people searching for a loved one - including many who have gone missing in London, or who have links to the capital.
Getwestlondon has teamed up with the charity in an appeal for several long-term missing people from the west London area.
Have you seen any of them? Do you know where they could be?
Ashley was 32 when he disappeared from west London on June 23 last year.
Jennene-Ann, 31, was last seen on September 17 2003 and is missing from the Kilburn area.
Leroy 'Groover' Daniels was 34 when he disappeared on April 15 2000. He has connections with London and Bristol.
Lisa Pour went missing from Kilburn on January 15 2013 at the age of 40.
She is described as 5ft 2ins tall, slim, with dark hair.
Alohan - also known as Benedicta Nagozi Onyordi - disappeared at the age of 17 from Hillingdon and was last seen on January 15 2013.
Alexander was just 16 when he went missing from Islington on August 2 2008.
Please call the charity Missing People free on 116 000 to report a sighting or if you are missing.
Missing People runs a free, confidential and 24-hour helpline supported by players of People’s Postcode Lottery.