The United States and "partner nations" have carried out airstrikes against Islamic State targets in Syria, the Pentagon has said.
Foreign Secretary Philip Hammond has said Britain will play a "leading role" in the coalition against IS but it is more likely to join air strikes in Iraq rather than Syria.
While nothing has been ruled out, Mr Hammond said there would be significant military, legal and technical differences in mounting strikes on Syrian territory.
In particular, strikes on IS in Iraq would be conducted at the invitation of the government in Baghdad, while Britain has ruled out any co-operation with the Syrian regime of President Bashar Assad.
The Syrian opposition has welcomed US-led air strikes on IS targets and said they will strength the fight against the Assad regime.
Special envoy to the president of the western-backed coalition group, Monzer Akbik, told Reuters: "The campaign should continue until the Islamic State is completely eradicated from Syrian lands."
Islamic State militants appear to have released a second video of British journalist John Cantlie.
In the five-minute clip, which is made to look like a TV documentary, the hostage criticises America for "underestimating the strength and zeal of their opponent".
Wearing an orange shirt and with closely cropped hair, he says: "Not since Vietnam have we witnessed such a potential mess in the making.
"Current estimates of 15,000 troops needed to fight the Islamic State are laughably low. The State has more mujahideen than this. This is not some undisciplined outfit with a few Kalashnikovs."
The video is thought to have been filmed before US-led air strikes launched in Syria. It ends with Cantlie saying: "Join me again for the next programme."
The US claims to have killed "tens" of IS fighters in air strike which began overnight.
Cantlie has been held hostage since 2012. Two US journalists were beheaded by the terror group last month.
Barclays is reportedly set to be handed a £38m fine by City regulators for failing to properly protect its clients' money.
It would be one of the biggest fines given outside of the penalties handed out for the rigging of the Libor rate.
Sky News reports that the fine relates to failings in Barclays' investment division between 2007 and 2012, before the appointment of the current chief executive, Antony Jenkins.
The Financial Conduct Authority is trying to ensure banks keep their own money separate from their clients' funds, due to the complexity of unwinding major financial institutions in the event they go out of business.
Tributes are being paid to 16 year old Macauley Moran, from Manchester, who is believed to have taken his own life. The champion teenage boxer - tipped to become a professional - was found dead at his home in Withington on Sunday
The teenager, who trained with Gorton Amateur Boxing Club, had become 58kg 2014 champion in the prestigious North West Amateur Boxing Association earlier this year and was tipped to turn pro.
His devastated family have told the Manchester Evening News how he battled with severe Attention Deficit Hyperactivity Disorder (ADHD), which sometimes lead to depression. It meant he struggled at school, but he excelled at boxing.
Dad Mario Conway, who lives with Macauley’s mum, Sarah Moran, and the couple’s two other sons and two daughters at the family home on Fenhurst Road, said: “He was fighting the best in the country and beating them with only putting in 50 per cent of the effort, while everyone else was giving it 110 per cent.
“He could only give it 50 per cent [because of his ADHD] but that was enough.
“You couldn’t tell him about how good he was - people would come from other countries to watch him fight.
“He was outgoing and cheeky.”
The incident is being treated as a sudden death with no suspicious circumstances.
Islamic State fighters have told Reuters they will respond to US-led air strikes in Syria and blamed Saudi Arabia for allowing it to happen.
The US military has said it has launched strikes from warships in international waters in the Red Sea and the North Arabian Gulf.
Luxury shoe brand Jimmy Choo is to float on the London Stock Exchange.
JAB Luxury, owner of the British firm, is offering existing shares in a deal which could see the firm valued around at least £700m.
It said it would be targeting a minimum free float of at least 25% of existing shares in Jimmy Choo.
The luxury brand, known for its high heels, had adjusted core profits of £27.6m in the first half of 2014.
The Jordanian Army confirmed it had mounted air strikes against "terrorist groups that were planning attacks in Jordan.
A statement did not reveal where the air force had struck but said: "Air force jets destroyed a number of targets that belong to some terrorist groups that sought to commit terror acts inside Jordan."