The fresh criticism of British officials and the failure to publish the flight records comes after the UK Foreign Office said it was still "assessing their suitability for publication" nine months after the documents were requested by human rights advocacy group Reprieve.
In a letter to Reprieve, Foreign Office Minister Hugo Swire wrote: "we are still assessing the suitability of the full flight records for publication."
Foreign Office officials had said that some of the flights records for Diego Garcia had been 'water damaged' and efforts were being made to look into whether they could be published.
Last July, UK Gov said it was "assessing" possible CIA renditions evidence for publication. 8mths later, it's told us it's "still assessing"— Reprieve (@Reprieve) April 8, 2015
CIA Rendition Claims
Critics say the flight records could shed light on allegations that the CIA did in fact use facilities on the island to interrogate terror suspects.
These explosive claims contradict the British government's official line on Diego Garcia and CIA involvement, which states that although CIA planes carrying torture suspects twice landed on the island in 2002 for refueling, none of the suspects were released from the plane.
However, the British government has in the past been accused of being evasive and misleading in its release of information relating to Diego Garcia. Despite earlier assurances from the government, in 2008 it was revealed to parliament that two planes carrying suspects had in fact landed on the island during 2002.
Calls for Greater Transparency
Donald Campbell from the NGO Reprieve, has accused the government of stalling in regards to the release of the documents, saying the publication of flight records would help to stop rumors and allegations regarding what activities may or may not have taken place on the island.
"Last summer, after the records reportedly suffered 'accidental' water damage, ministers promised that they were 'assessing their suitability for publication'. Eight months later, they say they are still 'assessing'.
"It is hard to see how such a long delay could be justified. We need to see full publication of those records without delay, in order to reassure the public that Britain is not involved in the cover-up of torture evidence."
The British government has also come under fire for its treatment of the native population of the Chagos Islands — a group of small, isolated atolls in the Indian Ocean for which Diego Garcia is apart of.
The UK forcibly removed the Chagossians from the islands in the late 1960s and 1970s to allow the US military to operate its Diego Garcia base.
But despite promising to make a decision on resettling the islands during the current government, no statement on the future of the exiled Chagossians has been made.