Peter Hendy, the Transport for London Commissioner, has said Crossrail 2 is needed because London's population is growing by "a tube train a week".
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The Met Police has turned down the chance to take part in a challenge which is sweeping the internet.
You'll recognise Canary Wharf and the London skyline – minus the Shard, Gherkin and O2 arena.
Dry with clear spells tonight. Lows of 6°C