The Kenyan school where the UK held Mau Mau rebels

In a school in central Kenya sits a small building that was once used by British colonial forces to torture detainees.

A weather-beaten sign on the outside describing it as a "torture room" serves as a reminder of what it used to be, but 91-year-old Wambugu wa Nyingi does not need to be reminded.

The tiny cell is one of several that were once on the site and in 1959 he spent three months in solitary confinement inside.

With no proper bed and a bucket for a toilet in the corner of the 2.5m (8ft) by 2m room, he was not allowed to leave and was forbidden from communicating with anyone.

What is now Mweru High School was 60 years ago, the Mweru Works Camp, one of a network of more than 50 detention sites in Kenya.

In the camps suspected Mau Mau fighters were held and subjected to brutal treatment, including torture, at the hands of the colonial government.