Daniel's film - made with reporter Aiden Hartley - provides evidence of Sudanese government attacks on tens of thousands of civilians in the troubled Nuba region of the country.
We see countless families - driven from their fields - sheltering in caves in the mountains as government forces bomb them. Sudan's President Omar al-Bashir has banned most UN agencies from operating in the area. Daniel filmed at the Catholic Mother of Mercy hospital, the only functioning hospital for a million civilians. Designed for 80 beds, it has 500 patients. His pictures show doctors forced to carry out operations on shrapnel-wounded children without anesthetic.
Huge viewer response to the film led to money being raised for a charity supporting the hospital. The UK Foreign Office said the film played an important role in the UK policy debate on Sudan.
The judges thought the film was haunting, and very moving. One said: "It is sensitively filmed - it is under-stated and well-paced. There are very many small moments which create a huge emotional impact on the viewer. It is not a well-known story but I don't think any of us will now be able to forget what is happening in those mountains "
Daniel started his career at Insight News TV in London where he specialized in putting together logistically challenging projects and negotiating difficult access. His films have been broadcast by Channel 4, BBC, Al Jazeera English and Current TV. He has covered subjects as diverse as witch trials in Central African Republic, gangs in South Africa and kidnapping rings in Nepal. For one investigation he went undercover, joining a group of illegal immigrants in Calais and secretly filming the journey into Britain on the back of a lorry.