Hundreds of cyclists campaigning to make the streets safer are protesting on the South Bank tonight.
The protest comes on the day MPs are debating the issue of bike safety.
Luke Hanrahan assesses what has already been done, and whether it is working.
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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