The Government has argued that too much time has passed to allow a fair trial over alleged atrocities by British authorities in Kenya in the 1950s.
Guy Mansfield QC said the Foreign and Commonwealth Office faced "irredeemable difficulties" with witnesses and documents to defend the claim.
Without those witnesses, and indeed with the necessarily limited recollections of those who do survive, the very complicated and difficult task of determining the competing factual positions cannot be fairly conducted.
There is a dearth of evidence which can be given as to what was in people's minds when they made decisions and sent or read telegrams or attended meetings or were told of matters or visited places.
More top news
The tech giant is reportedly exploring the idea of acquiring the music streaming service because of its strong links to popular artists.
Almost 20,000 hand-made shrouded figures have been laid out to mark the 100th anniversary of the Battle of the Somme.
Jeremy Corbyn has come under fire in a fresh row over Israel after he appeared to compare the Israeli state to jihadi terrorists.