David Cameron has taken the unusual step of inviting the Leader of the Opposition Harriet Harman to attend a National Security Council meeting on the threat posed by Islamic State jihadism.
The government is attempting to build a consensus on expanding the RAF's campaign of air strikes on Isis forces in Iran to Syria, and will also cover the elevated threat to British tourists in Tunisia following the Sousse beach massacre.
As well as Ms Harman, shadow defence secretary Vernon Coaker has been invited to the NSC, with Downing Street sources indicating the Prime Minister believes it would be "helpful" for the Labour figures to attend "given recent events".
Mr Cameron believes Isis needs to be confronted in its Syrian stronghold but is reluctant to ask MPs to vote on extending British military action into the country unless he can be assured of Labour's support.
Brits returning from Tunisia over safety fears have called the handling of the evacuation a "disgrace".
Tracey Caburn, who was on holiday with her mum and sister, arrived back at Manchester Airport today after cutting their break short.
She said: "It's a disgrace. We felt safe. We would've stayed there. We didn't feel threatened at all. There were guards on the roof, the gates, the beach. We wanted to stay.
"If they were going to bring us home so quickly they should not have let us fly out in the first place."
Les Aston from Shrewsbury was also disappointed to be home.
He said: "They let us go out there and now we've been brought back home. It makes no sense. The staff were in tears when we left the hotel. Tourism in Tunisia will be ruined."
The Foreign Secretary has defended the repatriation of 3,000 British tourists after complaints from the north African country that the UK was playing into terrorists' hands.
Philip Hammond said the Government had been careful not to act in a "knee-jerk manner" by urging Britons to quit Tunisia after the Sousse attack, and said the UK will continue to work with Tunisia on improving security and hoped to downgrade the travel advice "in the not too distant future".
British tourists returning from Tunisia have criticised the decision to bring them home after the Foreign Office changed its travel advice.Read the full story ›
The British Ambassador to Tunisia has said he knows many people will be disappointed at having to cut short their holidays there, but that the decision to change the threat level "wasn't taken lightly".
Hamish Cowell said investigations into the attack have made it clear "the threat level has increased", prompting the Foreign Office to change its travel advice.
On Thursday, the Foreign Office urged all Britons to leave Tunisia and advised against "all but essential travel" to the country.
Hundreds of mourners have gathered for the funeral of a couple killed in the terror attack in Tunisia which left 30 Brits dead.Read the full story ›
New footage shows the Tunisian massacre gunman walking calmly down a beach carrying his weapon during the attack.Read the full story ›
The Irish government has joined the Foreign Office in warning travellers against visiting Tunisia.
Following consultations and consideration of the security situation in Tunisia, Irish citizens are being advised to avoid non-essential travel to Tunisia in light of increased security concerns.
We are encouraging any Irish visitors to Tunisia to review whether their presence in Tunisia is essential and, where it is not, we are advising them to leave by commercial means.
Any Irish citizens in Tunisia who are not yet registered with the Department but who plan to remain in Tunisia are advised to register without delay.
A number of passengers heading back to the UK today say they did not want to cut their holidays short and would have preferred to stay.Read the full story ›
Thousands of Britons are expected to start flying home from Tunisia today after the Government urged them to leave immediately.
But why - two weeks after the Sousse massacre and three months after the Bardo Museum attack - has the advice changed only now?
- Until yesterday, the Foreign Office had warned of the "high threat from terrorism" in Tunisia but stopped short of advising people not to go
- This was despite an attack on the Bardo Museum in Tunis three months earlier which killed 21 tourists and one Tunisian
- It didn't change immediately after the Sousse massacre which left 30 Britons dead on June 26
- But the Foreign Office has now said the "intelligence and threat picture has developed considerably" since then and they believe another terror attack is "highly likely"