David Cameron has signed the Lough Erne declaration, which, according to the government, "focuses on private enterprise, which drives growth, reduces poverty, and creates jobs and prosperity for people around the world."
The G8 countries aimed to reduce corporate tax evasion and the document says member countries must work on closing tax loopholes.
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Russia will pay the price for launching air strikes to prop up the Assad regime, the US defence secretary has warned.
'Vote Leave' - a cross-party campaign calling for Britain to leave the European Union in the forthcoming referendum - has been launched.