The number of rail passenger journeys has increased dramatically from around 750 million per year to 1.5 billion, according to Transport Secretary Patrick McLoughlin.
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The study, conducted by the European Banking Authority, looked at how much capital would be used up in adverse economic conditions.
The victims were playing the popular game in Whittington Park in Holloway on Tuesday night, when three males suspects approached them.
A former Royal Marine who was recently engaged has been killed in a climbing accident in the French Alps.