The pilot due to fly a 'Moyes Out' banner over Old Trafford on Saturday said he would also carry a banner in support of the manager if he was asked to.
Speaking to ITV News sports correspondent Ian Payne, Chris Mustow said his company Air Ads had declined some "colourful" requests for messages in the past.
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About three billion Yahoo accounts were hit by hackers that included some linked to Russia by the FBI.
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A shocked cabinet was told by the Department of Transport of contingency plans to make sure vital supplies continue to reach these shores.