Police investigating the death of a woman, thought to have been beheaded in Edmonton, London, have named her as 82-year-old Palmira Silva.
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Her Majesty toured the show for 45 minutes.
M&S chief executive, Steve Rowe, has decided to take a more aggressive approach.
People are being encouraged to leave tributes and messages on the trees, which are on a trail in the city close to Manchester Arena.