The Missing Persons Bureau, based at Bramshill Police College in Hampshire, is the national and international point of contact for all missing people and unidentified body cases.

BBC: What happens when someone goes missing?

"In 2008, we were tasked to undertake a review by the Serious Organised Crime Agency's UK Missing Persons Bureau to review any outstanding cases of unidentified bodies and remains, " said Det Sgt Kirby.

BBC: Thames Valley Police bid to solve eight cold cases