Analysis of information sources in references of the Wikipedia article "Operation Yellowhammer" in English language version.
"It is the Prime Minister's petulant actions in sending an unsigned photocopy of the extension letter that has made triggering Yellowhammer necessary. It will be on our PM's head if they refuse an extension. Fortunately, our European partners conduct these negotiations with a degree of maturity alien to our PM. So I am confident that, in spite of Johnson's tantrum an extension, if it is required, will be granted, leaving Yellowhammer nothing more than an expensive taxpayer-funded PR stunt.
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