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Heathrow expansion approval could result in M25 tunnelling call

Heathrow described parliament’s “unambiguous” backing of the expansion of the airport as a “landmark vote” which will create “one of Europe’s largest infrastructure projects”.

The approval clears the way for Heathrow to submit an application for development consent for the project but the most recent plans suggest that the scheme will call for major ground engineering input.

In January, GE revealed that Heathrow planned to relocate, lower and place the M25 in a 600m long, 14 lane tunnel to make space for its third runway. Under the plan the motorway will be repositioned 150m to the west and lowered by 7m.


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