Heathrow's 'critical' expansion blueprint released

The government has published its blueprint for a third runway at Heathrow, describing expansion of the airport as "critical to national growth".

Transport Secretary Heidi Alexander launched a consultation on the renamed Heathrow expansion national policy statement (HENPS), setting out the conditions needed if the project is to be given the go-ahead.

Two proposals to expand Heathrow have previously been presented to the government.

The airport's owners, Heathrow Airport Limited (HAL), want to build a full-length, 3,500-metre runway, which would require the M25 motorway being moved.

HAL's scheme is estimated to cost £33bn, including £1.5bn to move the M25, and is expected to be fully privately financed.

It would see Heathrow's capacity increase to 756,000 flights and 150 million passengers a year.

Tycoon Surinder Arora, who makes a speciality of providing rooms for aircrew near airports, wants his company to install a 2,800-metre runway which would not involve moving the motorway.

In November last year, Alexander announced her preference was for a full-length runway.

She said the government considered the development covered by the HENPS was critical to national growth.

"This is a signal of the importance the government places on the need for expansion and will be an important additional factor in the planning balance."

The draft HENPS requires applicants to demonstrate how the transport network would accommodate increased passenger numbers, including how any necessary road and rail improvements would be delivered.

Expansion must be compatible with the UK's legally binding climate targets, not cause new breaches of air quality limits and ensure noise emissions are not worse than 2024 levels, with reductions where possible.