The Mayor of London, his HIV Ambassador pop star Annie Lennox and the Terrence Higgins Trust are celebrating 30 years of the charity and the HIV response in London.
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Spray cans were found near the bodies on tracks near a south London station.
Some 81% of passengers are satisfied with their journey, down three percentage points from spring 2017.
Politicians, police, members of the public and the family of terror victim Makram Ali paid their respects at a ceremony in Finsbury Park.