Heathrow alters runway plans to avoid digging up the M25 - Transport - News - London Evening Standard
The Evening Standard might consider this news, but the revised NW runway option was actually announced back in January:
http://www.heathrowairport.com/stati...roach_2014.pdf (page 51)
Still, good to see that the ES's Transport Editor has a good grasp of vertical topography:
"Heathrow will build a 600-metre tunnel taking traffic under the M25"
