This article contains a useful overview of the Clyst Honiton bypass tunnel, whose lights are being replaced by LEDs.
But the accompanying aerial view of it is the more interesting photo:
http://www.devonlive.com/news/devon-news/clyst-honiton-bypass-tunnel-near-463174
It is a “Growth Point” development site
http://www.exetersciencepark.co.uk/news-events/25-news/77-clyst-honiton-bypass
and, obviously, a new road could not interfere with that given its access to vastly more development land a la Lidl and Skypark!
With the airport and other developments in “Greater Exeter”, will Cranbrook become one of the most polluted places in Devon?