HUMAN rights groups are angry over David Cameron's decision to attend the Commonwealth summit in Sri Lanka in November.
The United Nations says at least 40,000 Tamil civilians were killed by Sri Lankan government forces in the the civil war in 2009 amid evidence of war crimes.
Jan Jananayagam, who heads Tamils Against Genocide, said: "I am disappointed as a British citizen and I am embarrassed for Britain that David Cameron is unable to muster a fraction of Canada’s leadership on this.
"I think we will will look back to regret this as an historic error. It is a sort of death knell for the Commonwealth."
The Sri Lankan government has denied its involvement in war crimes and has dismissed as "fiction" allegations of human rights abuse.
