Details on the BBC website, after a FOIA request
Syria airstrikes conducted by UK military pilots - BBC News
UK pilots embedded with coalition allies' forces have conducted airstrikes over Syria.
The nations include the US and Canada, who have taken part in strikes - but the British House of Commons voted in 2013 against military action in Syria.
Defence Secretary Michael Fallon has said MPs' approval would be needed before any new UK action in Syria.
"When embedded, UK personnel are effectively operating as foreign troops," the Ministry of Defence said.