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Matt Brittin, head of the company for Europe, the Middle East and Africa, said: "We are sorry to anybody that's been affected."
Matt Brittin, head of the company for Europe, the Middle East and Africa, said: "We are sorry to anybody that's been affected."
He made the comments at an industry conference after a number of well-known UK brands suspended advertising over concerns centred on content appearing on Google's YouTube platform.
M&S said: "In order to ensure brand safety, we are pausing activity across Google platforms whilst the matter is worked through."
Go Ape - the outdoors adventure firm - said it had suspended its advertising on YouTube after Sky News Business Correspondent Adam Parsons alerted the company to its ads being run alongside English Defence League videos.
The investment firm, Hargreaves Lansdown, also pulled its ads for the same reason.
Even the Government has done the same while global advertising giant Havas, which buys ad space for a number of big companies, suspended advertising last week.
Other big names to take similar action include McDonald's UK, Tesco and Sainsbury's, Audi UK, and L'Oreal in the UK and Ireland, plus high street banks Royal Bank of Scotland, HSBC and Lloyds.
Meanwhile, some businesses, including Barclays, are considering what to do - though Barclays does not currently have any advertising on YouTube or Google.
Sky, the owner of Sky News, said: "It is clearly unacceptable for ads to be appearing alongside inappropriate content and we are talking with Google to understand what they are doing to stop this."
Mr Brittin said Google already spent millions of dollars and employed thousands of people to try to ensure "bad advertising doesn't get through" and that this worked well "in the vast majority of cases".
But he acknowledged it could improve and said a review which had been going on "for some time" was being accelerated.