The Mayor, who has been working closely with all 32 London boroughs to deliver his cycling vision, will also outline details of the capital's first two Quietway routes, part of a wider network of radial and orbital cycling routes across London.
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The 20-year-old was stabbed after the party was gatecrashed after details were posted on social media.
Incident commander Andrew O'Loughlin said the fire was exceptional but it looked as though it had "possibly done its worst" when he arrived.
The ambulance arrived a minute after Weihong Yu gave birth in Camden.