The Transport for London Commissioner claims Crossrail 2 is needed because London's population is growing by "a tube train a week".
Peter Hendy joined Mayor Boris Johnson at the launch of a public consultation where the price tag for the project remained a mystery. Simon Harris reports.
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Samples from 95 buildings in 32 local authority areas have failed fire safety tests - 100% of the cladding samples submitted.
The double zip line will allow riders to travel at high speed close to the capital's famous landmarks.
The measure forms part of Sadiq Khan's plan to tackle knife crime after figures revealed a five per cent rise between 2014 and 2015.