British officials had worked for months trying to track down the captured men as rumours floated that they had been taken out of the country.
Nigerian government sources said that the men were killed before the arrival of security forces.
The wife of one of the guards holding the hostages in Nigeria claimed they were taken into a toilet and shot dead during the failed rescue attempt.
Today's hearing will take place at Wiltshire and Swindon Coroner's Court in Salisbury.
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Loudspeakers at the border have been switched off as a gesture of goodwill ahead of a meeting between the leaders of North and South Korea.
Liam Colgan vanished on February 10 while celebrating his brother’s stag-do in the German city.
Salah Abdeslam and an accomplice were handed the maximum sentence permissible over the incident in March 2016.