Terrorists from Daesh have singled out RAF bases in the UK for “lone wolf” attacks, according to a hitlist drawn up by a British couple in Syria, according to the Sunday Times.

Homegrown extremists are being urged to carry out atrocities at the sites, mirroring the murder of Fusilier Lee Rigby outside an army barracks in south London two years ago. Targets include RAF Lakenheath and RAF Mildenhall — two US-run airbases in Suffolk — and RAF Menwith Hill, North Yorkshire, the spying station used to intercept terrorist communications. RAF Alconbury in Cambridgeshire, another US-run airbase, has also been identified.

More than a dozen personnel who have served at the four sites are named in a dossier of military and diplomatic staff leaked online last week by Isis, also known as the so-called Islamic State.