We are asking people to stay in their houses because the electricity underground has not yet been isolated in the street outside.About 30 to 50 houses are affected and they are all thought to have basements which may be flooded.
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The operation carried out by Westminster City Council led to the seizure of £8,000 worth of cigarettes.
Armed troops have been stationed around Parliament to free up armed police to patrol the streets in the wake of the Manchester bomb attack.
Chelsea had planned an open top bus tour to show off the Premier League trophy and hope to add the FA Cup in Saturday's final with Arsenal.