The Crossrail 2 - a new rail link between south west and north east London - project has received overwhelming support from the public according to public consultation.
The Mayor of London has hailed the project as crucial in relieving congestion, boosting economic growth in the capital, and offering a vital interchange if the high speed HS2 national rail service goes ahead.
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The twins cubs, which were born in June, have been named Bert and Ernie after characters from Sesame Street.
The two victims died from their injuries in hospital after the explosion in Hertfordshire.
Investigations are continuing into the cause of the crash in chigwell which killed both people on board.