New figures show almost half of people who have HIV in England, live in the capital.
That same study shows that the number of gay and bisexual men being diagnosed with HIV reached an all-time high last year.
Nick Thatcher reports.
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More than a tenth of the Piccadilly Line train fleet is out of action because of emergency repairs to damaged wheels.
Rows of students stood and turned their backs before filing out of the lecture theatre.
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