Scotland Yard
Charlotte Brown was killed on the couple's first date.
Witnesses have described the harrowing scene.
The 31-year-old performed with the B Positive Choir.
A man has been arrested after a car crashed into security barriers outside the Houses of Parliament, Scotland Yard said.
Joel Urhie was killed in a fire at his family home.
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The pair are in hospital with non life-threatening injuries.
The men will appear in court on Monday.
More are expected in the coming weeks.
There were more than 22,000 moped-enabled crimes in London last year.