Europe Minister David Lidington has written to his Government colleague Transport Secretary Patrick McLoughlin saying the line will concrete over farmland which currently serves as natural flood protection for his constituents' homes.
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The Football Association has announced it has received an offer to buy Wembley Stadium.
The most hotly-tipped date is July 13, following the Nato summit which the president is due to attend in Brussels on the previous days.
Abbas Edalat, a professor in computer science and maths at Imperial College London, has reportedly been held in custody since April 15.