London;  Experts and human rights groups have questioned the UK government's claim that only one civilian death occurred during its military bombardment of Syria as part of an international coalition fighting Daesh.

In May 2018, Britain admitted to one civilian death caused by its military in eastern Syria, but the information given to the House of Commons by then-defense secretary Gavin Williamson contradicted records of civilian casualties kept by its allies.

The coalition report only mentioned one civilian casualty incident in eastern Syria on that day, naming Abu Kamal as the location, but investigators ruled out civilian deaths as a result of a coalition strike in the area.

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The aforementioned airstrike is also missing from recently released UK records.

Its report concluded that coalition strikes were not carried out in the geographical area corresponding to the report of civilian casualties, and Syrian nongovernmental organisations, as well as investigative journalists, found no evidence of a civilian death in the area on that day.

A Guardian investigation published last month into long-held British claims that it fought a "perfect" war in neighbouring Iraq, killing more than 3,000 Daesh militants with no civilian casualties, actually discovered six strikes that killed civilians in the Iraqi city of Mosul.

The report, conducted in collaboration with the watchdog Airwars, concluded that UK forces were "probably" to blame for civilian deaths in the six strikes on Mosul in 2016 and 2017.

Concerns have been raised about the British government's ability, transparency, and willingness to account for civilian deaths and injuries caused by its bombing campaign.

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The United Kingdom began bombing Daesh in Iraq as part of Operation Inherent Resolve in 2014, and Syria the following year, with over 4,000 munitions in both countries.

The Ministry of Defense declined to comment directly on discrepancies in the UK public record, coalition public statements, or Syrian group data.

"A highly trained and professional team of UK military personnel assessed that a civilian fatality had occurred," a spokesperson for the Ministry of Defense told the Guardian.

"We continue to be confident in the transparency of our reporting, and data published by the department can be considered as authoritative on UK military operations as possible," the statement continued.

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Later this year, a tribunal will hear a freedom of information request to determine whether it is in the public interest for the British public to know about civilian deaths carried out by its military in the fight against Daesh.