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.
More top news
Councils call for urgent changes to law that allow minibus drivers to operate without criminal record checks.
The maintenance worker spent 10 days in hospital after plunging 9.5 metres from a scaffold tower at a disused station.
Workers and managers are to stage another strike on Saturday amid a long-running dispute over jobs, pensions and closures.