The British government is negotiating payments to thousands of Kenyans who were detained and severely mistreated during the 1950s Mau Mau insurgency in what would be the first compensation settlement resulting from official crimes committed under imperial rule.

In a development that could pave the way for many other claims from around the world, government lawyers embarked upon the historic talks after suffering a series of defeats in their attempts to prevent elderly survivors of the prison camps from seeking redress through the British courts.

Those defeats followed the discovery of a vast archive of colonial-era documents which the Foreign Office (FCO) had kept hidden for decades, and which shed new and stark light on the dying days of British rule, not only in Kenya but around the empire. In the case of the Mau Mau conflict, the secret papers showed that senior colonial officials authorised appalling abuses of inmates held at the prison camps established during the bloody conflict, and that ministers and officials in London were aware of a brutal detention regime in which men and women were tortured and killed....