The videos and photos of the attack became viral and trending online. It was a very deadly attack and Prime Minister David Cameron vow to keep fighting the Islamic extremists.
Mr Cameron said that as the identities of the dead continued to emerge the full "horror" of events was becoming clear.
"But we will not be cowed," he said. "To our shock and grief we must add another word: resolve. Unshakeable resolve. We will stand up for our way of life.
"So ours must be a full-spectrum response - a response at home and abroad; in the immediate aftermath and far into the future."
He said the Islamic State group used social media as its "primary weapon" and police and security services must have "the tools they need to root out this poison".
Mr Cameron - who will chair another meeting of the Cobra emergency committee on Monday morning - said it was also vital to confront the "poisonous ideology" behind attacks like that carried out in Tunisia.
"We must be stronger at standing up for our values - of peace, democracy, tolerance, freedom," he said.
"We must be more intolerant of intolerance - rejecting anyone whose views condone the Islamist extremist narrative and create the conditions for it to flourish."
source: bbc.com
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