An investigation is underway after reports one of James Bulger's killers may have been identified on Twitter.
It is claimed the image could possibly show a recent photo of Jon Venables, who was jailed along with Robert Thompson for murdering the toddler 20 years ago.
There is a worldwide ban on identifying them.
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Thousands got tattoos of the Manchester bee as a sign of solidarity after the attack, with their impact going beyond ink on their skin.
People are being encouraged to leave tributes and messages on the trees, which are on a trail in the city close to Manchester Arena.
It will be Harry and Meghan's first royal duty as husband and wife after they were married in a ceremony at Windsor Castle on Saturday.