At least 30 British people are believed to have died in the Tunisia terror attack, Sky News reported.

If confirmed it would double the number of Britons known to have been killed in the deadly rampage by the gunman Seifeddine Rezgui.

It would also mean UK citizens make up the majority of the 38 victims of the atrocity at the beach resort in Sousse on Friday.

Home Secretary Theresa May has warned identifying the dead will take time because few of the holidaymakers were carrying IDs.

The Sousse coroner is insisting on identification through medical and dental records and not just a family member.

The massacre is the worst loss of life of Britons in a terror attack since the 7/7 bombings.