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The Daily Mail headline says Labour's union backers were 'telling PM: We can't go back'. The body shows GMB's Gary Smith said this to the Sunday Times, not to the Prime Minister, and only after saying he 'would be cautious about fully rejoining'. The headline also shortens his words, which were 'we can't go back to where we were before'.
Headline goes beyond the article
Minor
“telling PM: 'We can't go back'”
Why this matters
The headline says the unions told the Prime Minister directly, and it cuts Smith's words down to 'We can't go back'.
The impression it gives
The unions delivered a message to Burnham, and they reject any return to the EU.
The context
Smith said it in an interview with the Sunday Times, not to the Prime Minister. His full words were 'we can't go back to where we were before', which came after 'I would be cautious about fully rejoining'.
How we know
Elsewhere in the article“the general secretary of the GMB union, told the Sunday Times”