A HOUSE of Lords inquiry has concluded it is “highly likely” that UK weaponry had caused “significant” civilian casualties during Yemen’s four-year civil war.

The International Relations Committee says Britain is “narrowly on the wrong side” of international humanitarian law over arms sales to Saudi Arabia. It says relying on assurances by the Saudis that they were not targeting civilians was not an “adequate way” of implementing the UK’s obligations under the international Arms Trade Treaty.

The Government has faced repeated calls to suspend arms sales to Saudi Arabia after the latter began air strikes in March 2015 against Iranian-backed Houthi rebels who seized control of large swathes of the country.

Last year, the United Nations Human Rights Office estimated that at least 6600 civilians had died as a result of indiscriminate bombing and another 10,000 had been injured, although it acknowledged the true figures were likely to be significantly higher. In its report, published today, the committee said that since the start of the conflict the UK had licensed £4.7 billion of arms exports to Saudi Arabia and a further £860 million to its partners in the international coalition against the Houthis.

Typhoon jet fighters and associated systems accounted for the majority of exports approved for the Saudis.

In evidence to the committee, ministers argued that the Government’s licensing process was “narrowly on the right side of international humanitarian law”. The committee, however, said: “Although conclusive evidence is not yet available, we assess that it is narrowly on the wrong side.

“Given the volume and type of arms being exported to the Saudi-led coalition, we believe they are highly likely to be the cause of significant civilian casualties in Yemen, risking the contravention of international humanitarian law. We are deeply concerned that the Saudi-led coalition’s misuse of their weaponry is causing, whether deliberately or accidentally, loss of civilian life.”

Overall, the committee described the humanitarian situation in Yemen, with more than 10 million people reliant on World Food Programme support, as “unconscionable”.