The Liberal Democrat leader Nick Clegg has admitted his party will face a tough fight in London at the next election, when Brent Central MP Sarah Teather stands down.
Last week the former education minister criticsed her own party and announced she was quitting in 2015. In an interview with ITV News, Nick Clegg said he knows the keeping the seat won't be easy. He spoke to Paul Brand.
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Police have released an e-fit of a man suspected of attacking her.
The force has been tweeting after carrying out a series of dawn raids.
Adenike Akingbogun made the dangerous manoeuvre after ignoring the crossing lights and driving onto the tracks.