Some of Britain's best known companies have reacted to the controversy over extremist content on Google's You Tube platform.
Here's what they have said:
"In order to ensure brand safety, we are pausing activity across Google platforms whilst the matter is worked through."
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"We are not aware of any issue with our ads to date, but we take this issue extremely seriously and are suspending all advertising until they fix this."
"HSBC has strong procedures in place to ensure that our brand is not associated with nor advertises alongside inappropriate content.
"We take any breach of our digital advertising standards very seriously and have put advertising with Google on hold at this time."
"We have strict processes in place to prevent our adverts from appearing alongside inappropriate online content.
"It is unacceptable that Google is allowing our ads to be placed alongside these videos on Youtube.
"We have suspended all Sainsbury's and Argos advertising on the site with immediate effect and are seeking urgent assurances from Google that this issue is being taken seriously and addressed."
"We are disappointed to learn that the safeguards we have in place to protect against our adverts appearing alongside unacceptable content, have fallen through.
"We are now seeking reassurances from Google as to how they can improve its filters to ensure this does not happen in the future.
"Whilst we have those discussions, all advertising through this channel has been removed with immediate effect."
"As soon as we learned of this issue with Google advertising, we immediately paused all of our YouTube campaigns as a precaution.
"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."
"We have paused all YouTube advertising with immediate effect. We will be carrying out a full review before advertising on YouTube and ensure there are guarantees in place that our adverts will only run on appropriate YouTube videos."