British Prime Minister David Cameron pledged that Britain will not give up its way of life or cower in the face of terrorism as he urged the country to hold a minute’s silence at midday on Friday in memory of the UK citizens killed in

British Prime Minister David Cameron pledged that Britain will not give up its way of life or cower in the face of terrorism as he urged the country to hold a minute’s silence at midday on Friday in memory of the UK citizens killed in Tunisia.

Cameron promised to mount a "full investigation" into Friday's attack on a beach resort near the city of Sousse as the number of Britons killed in a gun attack in Tunisia was expected to rise.

"We will not give up our way of life and cower in the face of terrorism," Cameron said, underlining the need both to fight ISIL in Iraq and Syria and to tackle non-violent extremists in Britain.

He also said Britain would hold a minute's silence on Friday for the one-week anniversary of the attack, the worst for the country since four suicide bombings in London on July 7, 2005 killed 52 people.

Cameron said the killers had declared war on Britain, adding the government would provide a “full spectrum” response including helping the injured return to the UK within 24 hours.

Flags were flown at half mast over Cameron's Downing Street office in sympathy with the victims.

This came as informed sources reported that the death toll was to top 30.

The confirmed death toll of Britons is currently at 18 out of the 38 foreign tourists who were mowed down by a Kalashnikov-toting gunman, identified as 23-year-old student Seifeddine Rezgui.
  
Tunisia says four other victims have been identified as tourists from Germany, Portugal, Ireland and Belgium. Ireland said Sunday three of its citizens were killed.