Prime Minister David Cameron said the rules for helicopter flights over central London would need to be carefully looked at following this morning's fatal crash.
Speaking at Prime Minister's Questions, he also paid tribute to the "brave and professional" response of the emergency services to the crash in Vauxhall, central London, after a commercial helicopter hit a crane on a high-rise building.
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The owner lost his appeal.
Two women have died in a crash involving a car and police vehicle in Calcot. It happened on the A4 Bath Road just before 4pm on Tuesday.
Trains are expected to be disrupted into this afternoon.