BBC:
The UK government and armed forces have been accused of covering up the killing of civilians by British troops in Afghanistan and Iraq.
An investigation by BBC Panorama and the Sunday Times has spoken to 11 British detectives who said they found credible evidence of war crimes.
Soldiers should have been prosecuted for the killings, say insiders.
The Ministry of Defence (MoD) said it rejected the unsubstantiated allegation of a pattern of cover-ups.