“As I have repeatedly stated, it remains entirely inappropriate to name those who confided in me without their consent.
“For the avoidance of doubt: I have not and I will not.
“I will always assist the inquiry (outside of those parameters).
“This process has placed an unacceptable strain on me and my family. I am no longer a public figure; I will not be commenting further.”
It is unclear what information Mr Mercer has provided to the inquiry.
Mr Mercer served as the veterans minister until earlier this month, when his party lost the general election.
The decision by the inquiry not to take action against Mr Mercer is the latest in a long-running saga, which has seen the former minister clash with the inquiry.
Giving evidence earlier this year, Mr Mercer repeatedly refused to name officers who had given him information when he was a backbench MP.
Defending his position, he told the inquiry last month: “The one thing you can hold on to is your integrity and I will be doing that with these individuals.”
In response, inquiry chair Sir Charles Haddon-Cave said: “Integrity requires moral courage to do what is right, even when it may not be popular.”
Sir Charles had also warned the former Plymouth Moor View MP that failing to comply with the inquiry would be a “criminal offence punishable with imprisonment and/or a fine”.
The inquiry was set up, external in December 2022 to examine “alleged unlawful activity by UK Special Forces during deliberate detention operations in Afghanistan in the period mid-2010 to mid-2013”.
