A report into anti-Islamic attacks in the UK has found that the majority of incidents are taking place online.
Of the 584 incidents recorded between 1 April 2012 and 30 April 2013, three quarters of them occurred online and involved insults, abusive behaviour and threats of offline action.
Researchers also found there was a direct link to far-right groups in almost 70% of reported online incidents, with the English Defence League allegedly being particularly active.
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"My sincerest apologies to everyone who purchased tickets and were planning to come to the upcoming shows."
His comments at the Defence and Security Forum on Monday came after a £20 billion black hole in the budget for the next decade emerged.
The Foreign Secretary said he thinks the health service should be "at the very top of the list" for a windfall after the UK leaves the EU.