A couple from Swanley have described the moment they escaped the Tunisian terror attack which is feared to have killed at least 30 Britons.

A total of 38 people perished after a gunman opened fire on a beach in the Sousse resort on Friday.

The identities of 17 Britons who died have been confirmed, but sources have indicated the British death toll could rise as high as 30. Three Irish nationals are also among the dead.

Talking to the Guardian scaffolder Glenn Whitehead and his wife Anita, from Swanley, said they had been relaxing on their sunbeds when they heard what they initially believed to be fireworks.

They described seeing a man running along the beach with what looked like a machine gun before hearing bullets close to their heads.

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Tributes have been left at the resort in the wake of the massacre. (c.) PA.

Mr Whitehead told the Guardian that they ran inside a hotel where around 20 staff and tourists were sheltering from the chaos.

The couple waited for 20 minutes before they were led outside by staff, where victims lay in pools of blood by the hotel pool and in the foyer.

He said: "I looked around the beach and all I could see were dead people covered in towels.

“Where we were lying were a German mother and daughter. When I got back one of them was covered over, dead."

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A tourist places flowers at the scene of the killings. AP Photo/Abdeljalil Bounhar

Prime minister David Cameron, who is chairing another meeting of the Government's Cobra emergency committee later, said Home Secretary Theresa May and Foreign Office minister Tobias Ellwood will be visiting the resort today.

He said: "This is an absolutely horrific attack and I know it has shocked the whole of the country, it has shocked the whole of the world."

He renewed his appeal for an end to the use of the name Islamic State, which he described as a "poisonous death cult".

The killing spree by Kalashnikov-wielding student Seifeddine Rezgui targeted western tourists on the beach at the RIU Imperial Marhaba and the RIU Bellevue and only ended when he was shot dead by police. A bomb was found on his body.

Mr Cameron also disclosed that an RAF C17 transport plane is being deployed to help bring stranded tourists home, and potentially repatriate bodies.