The RAF interception of Syrian Jets over Cyprus is a sign that Britain can still be sucked into Syrian intervention through regional spill over and unforeseen events.

Perhaps we should stake out the case for interventionism in very simple terms: an internationalist party does not stand by and permit the slaughter of children in gas attacks.

The brutal images coming from Woolwich could not have been more surreal. A man with bloodied hands holds a knife and explains he has just hacked a British soldier to death on the streets of London in broad daylight.