Amateur footage has emerged of the evacuation of a Boeing 787 Dreamliner in western Japan following an emergency landing.
An All Nippon Airways flight reported smoke in the cabin and a cockpit message showing battery problems. As a result the airline has grounded all of its Dreamliners.
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The Metropolitan Police Federation, which set up the official JustGiving site, said it felt a "suitable amount" had been collected.
There is no evidence the Westminster attacker Khalid Masood was associated with so-called Islamic State or al Qaeda, the Met Police said.
Janet Ajao said in a statement: "I do not condone his actions nor support the beliefs he held that led to him committing this atrocity."