The new dual carriageway across the Stonehenge World Heritage Site (WHS) would result in serious damage to archaeology and landscape, and draw new traffic into the WHS.  Previously tranquil areas would suffer.

Map below shows the A303 tunnel and road proposal across World Heritage Site.

Our key concerns were:

  • Consultation period of 7 weeks was too short for a UNESCO World Heritage Site.
  • No options offered to protect the World Heritage Site
  • Tunnel too short (WHS is 5.4km/3.4 miles wide, tunnel is 2.9km/1.8 miles long).
  • Serious damage to archaeology and landscape in direct contravention of planning policy and World Heritage Convention.
  • Detrimental to wildlife especially the RSPB reserve for Stone Curlews.
  • £1.4bn expenditure won’t solve traffic problems

The Stonehenge Alliance has responded to Highways England’s consultation expressing these serious concerns both with the consultation and the proposals.  The responses of many other organisations were also equally damming.


There are numerous technical documents and maps on the Highways England consultation page here.

What can you do to help?

1. If you haven’t already done so, please, sign our petition and encourage your friends to do the same.

KINDLY NOTE: Since setting up the petition, we have learned more about the recently discovered Mesolithic site at Blick Mead. This has led us to consider that if Government insists on a tunnel under the WHS, it must be long enough to avoid the WHS and its setting altogether. This would be in line with planning policy and World Heritage Convention safeguards. We cannot change the wording but our intention to avoid further damage is clearly stated in the petition.

2. Please write to UNESCO and, if possible, to the National Trust as well, expressing your concerns. Editing your responses in your own words will be more effective.

Follow our campaign on Facebook, Twitter and our blog.

Posters and leaflets


Front of leaflet



Reverse of leaflet








Information poster